diff --git a/_posts/tests/2011-03-27-destroy01.html b/_posts/tests/2011-03-27-destroy01.html
index 94f31de..12c22a6 100644
--- a/_posts/tests/2011-03-27-destroy01.html
+++ b/_posts/tests/2011-03-27-destroy01.html
@@ -12,7 +12,12 @@ category: tests
   </style>
 
   <section id="copy">
-    <p>After <code>destroy</code>-ing Isotope, original CSS gets re-applied</p>
+    <p>Click <em>init</em> button the <em>destroy</em>. Original CSS, pre-init, should be re-applied, all items back to visibility.</p>
+  </section>
+
+  <section id="options">
+    <button id="init">Init Isotope instance</button>
+    <button id="destroy">Destroy Isotope instance</button>
   </section>
 
   <div id="container" style="height: 600px">
@@ -28,9 +33,15 @@ category: tests
     
       var $container = $('#container');
     
-      $container.isotope({
-        itemSelector: '.element',
-        filter: '.metal'
+      $('#init').click(function(){
+        $container.isotope({
+          itemSelector: '.element',
+          filter: '.metal'
+        });
+      });
+      
+      $('#destroy').click(function(){
+        $container.isotope('destroy');
       });
     
     });
diff --git a/_posts/tests/2011-03-27-no-items01.html b/_posts/tests/2011-03-27-no-items01.html
index 50c73f1..14cf5d8 100644
--- a/_posts/tests/2011-03-27-no-items01.html
+++ b/_posts/tests/2011-03-27-no-items01.html
@@ -5,7 +5,7 @@ category: tests
 ---
 
   <section id="copy">
-    <p>What happens when there are no items for Isotope/</p>
+    <p>What happens when there are no items for Isotope? If no items match `itemSelector`, container collapses.  Plugin still <code>return this</code>.</p>
   </section>
 
   <div id="container">
@@ -23,7 +23,7 @@ category: tests
     
       $container.isotope({
         itemSelector: '.foo'
-      });
+      }).css('border', '10px solid');
     
     });
   </script>
\ No newline at end of file
diff --git a/_posts/tests/2011-04-26-item-position-data01.html b/_posts/tests/2011-04-26-item-position-data01.html
index d9a6a3a..25b2bd7 100644
--- a/_posts/tests/2011-04-26-item-position-data01.html
+++ b/_posts/tests/2011-04-26-item-position-data01.html
@@ -5,30 +5,11 @@ category: tests
 ---
 
   <section id="copy">
-    <p></p>
+    <p><code>itemPositionDataEnabled</code> option is enabled.  </p>
   </section>
   
   <section id="options" class="clearfix">
 
-    <h3>Filters</h3>
-
-    <ul id="filters" class="option-set floated clearfix">
-      <li><a href="#show-all" class="selected">show all</a></li>
-      <li><a href="#metalloid">metalloid</a></li>
-      <li><a href="#metal">metal</a></li>
-      <li><a href="#alkali">alkali</a></li>
-      <li><a href="#alkaline-earth">alkaline-earth</a></li>
-      <li><a href="#inner-transition">inner-transition</a></li>
-      <li><a href="#lanthanoid">lanthanoid</a></li>
-      <li><a href="#actinoid">actinoid</a></li>
-      <li><a href="#transition">transition</a></li>
-      <li><a href="#post-transition">post-transition</a></li>
-      <li><a href="#nonmetal">nonmetal</a></li>
-      <li><a href="#other">other</a></li>
-      <li><a href="#halogen">halogen</a></li>
-      <li><a href="#noble-gas">noble-gas</a></li>
-    </ul>
-
     {% include sort-buttons.html %}
 
     <h3>Etc</h3>
@@ -39,7 +20,7 @@ category: tests
     </ul>
   </section> <!-- #options -->
 
-  <div id="container">
+  <div id="container" class="clickable clearfix">
     {% for element in site.elements limit:40 %}
       {% include element-partial.html %}
     {% endfor %}
@@ -48,16 +29,25 @@ category: tests
   <script src="../{{ site.jquery_js }}"></script>
   <script src="../{{ site.isotope_js }}"></script>
   <script>
+  
     $(function(){
     
       var $container = $('#container');
       
       {% include sort-buttons.js %}
 
-      // change size of clicked element
-      $container.find('.element').live('click', function(){
-        $(this).toggleClass('large');
-        $container.isotope('reLayout');
+      // toggle variable sizes of all elements
+      $('#toggle-sizes').find('a').click(function(){
+        $container
+          .toggleClass('variable-sizes')
+          .isotope('reLayout');
+        return false;
+      });
+
+      // log item position
+      $container.find('.element').click(function(){
+        var position = $(this).data('isotope-item-position');
+        console.log( position.x + ', ' + position.y );
       });
     
       $container.isotope({
diff --git a/jquery.isotope.js b/jquery.isotope.js
index 672f37a..69a8e74 100644
--- a/jquery.isotope.js
+++ b/jquery.isotope.js
@@ -1,5 +1,5 @@
 /**
- * Isotope v1.2.110520
+ * Isotope v1.3.110523
  * An exquisite jQuery plugin for magical layouts
  * http://isotope.metafizzy.co
  *
@@ -402,7 +402,7 @@
       // bind resize method
       if ( this.options.resizable ) {
         $(window).bind( 'smartresize.isotope', function() { 
-          instance.element.isotope('resize');
+          instance.resize();
         });
       }
       
@@ -441,10 +441,7 @@
     },
 
     option: function( key, value ){
-      
       // get/change options AFTER initialization:
-      // you don't have to support all these cases,
-      // but here's how:
     
       // signature: $('#foo').bar({ cool:false });
       if ( $.isPlainObject( key ) ){
@@ -454,17 +451,11 @@
           this._updateOption( optionName );
         }
     
-      // signature: $('#foo').option('cool');  - getter
-      } else if ( key && typeof value === "undefined" ){
-        return this.options[ key ];
-        
       // signature: $('#foo').bar('option', 'baz', false);
       } else {
         this.options[ key ] = value;
         this._updateOption( key );
       }
-    
-      return this; // make sure to return the instance!
     },
     
     // ====================== updaters ====================== //
@@ -578,17 +569,14 @@
           };
       
       this.$filteredAtoms.sort( sortFn );
-      
-      return this;
     },
 
     _getSorter : function( elem, sortBy ) {
       return $(elem).data('isotope-sort-data')[ sortBy ];
     },
 
-    // ====================== Layout ======================
+    // ====================== Layout Helpers ======================
 
-    
     _translate : function( x, y ) {
       return { translate : [ x, y ] };
     },
@@ -644,20 +632,20 @@
       }
       
       this.isLaidOut = true;
-
-      return this;
     },
     
     
     resize : function() {
-      return this[ '_' + this.options.layoutMode + 'Resize' ]();
+      if ( this[ '_' + this.options.layoutMode + 'ResizeChanged' ]() ) {
+        this.reLayout();
+      }
     },
     
     
     reLayout : function( callback ) {
       
-      return this[ '_' +  this.options.layoutMode + 'Reset' ]()
-        .layout( this.$filteredAtoms, callback );
+      this[ '_' +  this.options.layoutMode + 'Reset' ]();
+      this.layout( this.$filteredAtoms, callback );
       
     },
     
@@ -685,7 +673,8 @@
         instance.$filteredAtoms = instance.$filteredAtoms.add( $filteredAtoms );
       });
       
-      this._sort().reLayout( callback );
+      this._sort();
+      this.reLayout( callback );
       
     },
     
@@ -734,7 +723,7 @@
       this.$allAtoms = this._shuffleArray( this.$allAtoms );
       this.$filteredAtoms = this._filter( this.$allAtoms );
       
-      return this.reLayout( callback );
+      this.reLayout( callback );
     },
     
     // destroys widget, returns elements and container back (close) to original style
@@ -770,11 +759,15 @@
 
     },
     
+    
+    // ====================== LAYOUTS ======================
+    
     // calculates number of rows or columns
     // requires columnWidth or rowHeight to be set on namespaced object
     // i.e. this.masonry.columnWidth = 200
-    _getSegments : function( namespace, isRows ) {
-      var measure  = isRows ? 'rowHeight' : 'columnWidth',
+    _getSegments : function( isRows ) {
+      var namespace = this.options.layoutMode,
+          measure  = isRows ? 'rowHeight' : 'columnWidth',
           size     = isRows ? 'height' : 'width',
           UCSize   = isRows ? 'Height' : 'Width',
           segmentsName = isRows ? 'rows' : 'cols',
@@ -798,44 +791,32 @@
       // i.e. this.masonry.columnWidth = ...
       this[ namespace ][ measure ] = segmentSize;
       
-      return this;
-      
+    },
+    
+    _checkIfSegmentsChanged : function( isRows ) {
+      var namespace = this.options.layoutMode,
+          segmentsName = isRows ? 'rows' : 'cols',
+          prevSegments = this[ namespace ][ segmentsName ];
+      // update cols/rows
+      this._getSegments( isRows );
+      // return if updated cols/rows is not equal to previous
+      return ( this[ namespace ][ segmentsName ] !== prevSegments );
     },
 
-  // ====================== LAYOUTS ======================
-  
-  
-  // ====================== Masonry ======================
+    // ====================== Masonry ======================
   
-    _masonryPlaceBrick : function( $brick, setCount, setY ) {
-      // here, `this` refers to a child element or "brick"
-          // get the minimum Y value from the columns
-      var minimumY  = Math.min.apply( Math, setY ),
-          setHeight = minimumY + $brick.outerHeight(true),
-          i         = setY.length,
-          shortCol  = i,
-          setSpan   = this.masonry.cols + 1 - i,
-          x, y ;
-      // Which column has the minY value, closest to the left
+    _masonryReset : function() {
+      // layout-specific props
+      this.masonry = {};
+      // FIXME shouldn't have to call this again
+      this._getSegments();
+      var i = this.masonry.cols;
+      this.masonry.colYs = [];
       while (i--) {
-        if ( setY[i] === minimumY ) {
-          shortCol = i;
-        }
-      }
-    
-      // position the brick
-      x = this.masonry.columnWidth * shortCol + this.posLeft;
-      y = minimumY;
-      this._pushPosition( $brick, x, y );
-
-      // apply setHeight to necessary columns
-      for ( i=0; i < setSpan; i++ ) {
-        this.masonry.colYs[ shortCol + i ] = setHeight;
+        this.masonry.colYs.push( this.posTop );
       }
-
     },
   
-  
     _masonryLayout : function( $elems ) {
       var instance = this;
       $elems.each(function(){
@@ -846,7 +827,7 @@
 
         if ( colSpan === 1 ) {
           // if brick spans only one column, just like singleMode
-          instance._masonryPlaceBrick( $this, instance.masonry.cols, instance.masonry.colYs );
+          instance._masonryPlaceBrick( $this, instance.masonry.colYs );
         } else {
           // brick spans more than one column
           // how many different places could this brick fit horizontally
@@ -863,45 +844,58 @@
             groupY[i] = Math.max.apply( Math, groupColY );
           }
         
-          instance._masonryPlaceBrick( $this, groupCount, groupY );
+          instance._masonryPlaceBrick( $this, groupY );
         }
       });
-      return this;
     },
-  
-    // reset
-    _masonryReset : function() {
-      // layout-specific props
-      this.masonry = {};
-      // FIXME shouldn't have to call this again
-      this._getSegments('masonry');
-      var i = this.masonry.cols;
-      this.masonry.colYs = [];
+    
+    // worker method that places brick in the columnSet
+    //   with the the minY
+    _masonryPlaceBrick : function( $brick, setY ) {
+          // get the minimum Y value from the columns
+      var minimumY  = Math.min.apply( Math, setY ),
+          setHeight = minimumY + $brick.outerHeight(true),
+          i         = setY.length,
+          shortCol  = i,
+          setSpan   = this.masonry.cols + 1 - i,
+          x, y ;
+      // Which column has the minY value, closest to the left
       while (i--) {
-        this.masonry.colYs.push( this.posTop );
+        if ( setY[i] === minimumY ) {
+          shortCol = i;
+        }
       }
-      return this;
-    },
-  
-    _masonryResize : function() {
-      var prevColCount = this.masonry.cols;
-      // get updated colCount
-      this._getSegments('masonry');
-      if ( this.masonry.cols !== prevColCount ) {
-        // if column count has changed, do a new column cound
-        this.reLayout();
+    
+      // position the brick
+      x = this.masonry.columnWidth * shortCol + this.posLeft;
+      y = minimumY;
+      this._pushPosition( $brick, x, y );
+
+      // apply setHeight to necessary columns
+      for ( i=0; i < setSpan; i++ ) {
+        this.masonry.colYs[ shortCol + i ] = setHeight;
       }
 
-      return this;
     },
-  
+    
     _masonryGetContainerSize : function() {
       var containerHeight = Math.max.apply( Math, this.masonry.colYs ) - this.posTop;
       return { height: containerHeight };
     },
-
   
-  // ====================== fitRows ======================
+    _masonryResizeChanged : function() {
+      return this._checkIfSegmentsChanged();
+    },
+  
+    // ====================== fitRows ======================
+    
+    _fitRowsReset : function() {
+      this.fitRows = {
+        x : 0,
+        y : 0,
+        height : 0
+      };
+    },
   
     _fitRowsLayout : function( $elems ) {
       this.width = this.element.width();
@@ -928,74 +922,60 @@
         instance.fitRows.x += atomW;
   
       });
-      return this;
-    },
-  
-    _fitRowsReset : function() {
-      this.fitRows = {
-        x : 0,
-        y : 0,
-        height : 0
-      };
-      return this;
     },
   
     _fitRowsGetContainerSize : function () {
       return { height : this.fitRows.height };
     },
   
-    _fitRowsResize : function() {
-      return this.reLayout();
+    _fitRowsResizeChanged : function() {
+      return true;
     },
   
 
-  // ====================== cellsByRow ======================
+    // ====================== cellsByRow ======================
   
     _cellsByRowReset : function() {
-      this.cellsByRow = {};
-      this._getSegments('cellsByRow');
-      this.cellsByRow.rowHeight = this.options.cellsByRow.rowHeight || this.$allAtoms.outerHeight(true);
-      return this;
+      this.cellsByRow = {
+        index : 0
+      };
+      // get this.cellsByRow.columnWidth
+      this._getSegments();
+      // get this.cellsByRow.rowHeight
+      this._getSegments(true);
     },
 
     _cellsByRowLayout : function( $elems ) {
       var instance = this,
-          cols = this.cellsByRow.cols;
-      this.cellsByRow.atomsLen = $elems.length;
-      $elems.each( function( i ){
+          props = this.cellsByRow;
+      $elems.each( function(){
         var $this = $(this),
-            x = ( i % cols + 0.5 ) * instance.cellsByRow.columnWidth -
+            col = props.index % props.cols,
+            row = ~~( props.index / props.cols ),
+            x = ( col + 0.5 ) * props.columnWidth -
                   $this.outerWidth(true) / 2 + instance.posLeft,
-            y = ( ~~( i / cols ) + 0.5 ) * instance.cellsByRow.rowHeight -
+            y = ( row + 0.5 ) * props.rowHeight -
                   $this.outerHeight(true) / 2 + instance.posTop;
         instance._pushPosition( $this, x, y );
+        props.index ++;
       });
-      return this;
     },
 
     _cellsByRowGetContainerSize : function() {
-      return { height : Math.ceil( this.cellsByRow.atomsLen / this.cellsByRow.cols ) * this.cellsByRow.rowHeight + this.posTop };
+      return { height : Math.ceil( this.$filteredAtoms.length / this.cellsByRow.cols ) * this.cellsByRow.rowHeight + this.posTop };
     },
 
-    _cellsByRowResize : function() {
-      var prevCols = this.cellsByRow.cols;
-      this._getSegments('cellsByRow');
-
-      // if column count has changed, do a new column cound
-      if ( this.cellsByRow.cols !== prevCols ) {
-        this.reLayout();
-      }
-      return this;
+    _cellsByRowResizeChanged : function() {
+      return this._checkIfSegmentsChanged();
     },
   
   
-  // ====================== straightDown ======================
+    // ====================== straightDown ======================
   
     _straightDownReset : function() {
       this.straightDown = {
         y : 0
       };
-      return this;
     },
 
     _straightDownLayout : function( $elems ) {
@@ -1006,49 +986,31 @@
         instance._pushPosition( $this, instance.posLeft, y );
         instance.straightDown.y += $this.outerHeight(true);
       });
-      return this;
     },
 
     _straightDownGetContainerSize : function() {
       return { height : this.straightDown.y + this.posTop };
     },
 
-    _straightDownResize : function() {
-      this.reLayout();
-      return this;
+    _straightDownResizeChanged : function() {
+      return true;
     },
 
 
-  // ====================== masonryHorizontal ======================
-  
-    _masonryHorizontalPlaceBrick : function( $brick, setCount, setX ) {
-      // here, `this` refers to a child element or "brick"
-          // get the minimum Y value from the columns
-      var minimumX  = Math.min.apply( Math, setX ),
-          setWidth  = minimumX + $brick.outerWidth(true),
-          i         = setX.length,
-          smallRow  = i,
-          setSpan   = this.masonryHorizontal.rows + 1 - i,
-          x, y ;
-      // Which column has the minY value, closest to the left
+    // ====================== masonryHorizontal ======================
+    
+    _masonryHorizontalReset : function() {
+      // layout-specific props
+      this.masonryHorizontal = {};
+      // FIXME shouldn't have to call this again
+      this._getSegments( true );
+      var i = this.masonryHorizontal.rows;
+      this.masonryHorizontal.rowXs = [];
       while (i--) {
-        if ( setX[i] === minimumX ) {
-          smallRow = i;
-        }
-      }
-
-      // position the brick
-      x = minimumX;
-      y = this.masonryHorizontal.rowHeight * smallRow + this.posTop;
-      this._pushPosition( $brick, x, y );
-
-      // apply setHeight to necessary columns
-      for ( i=0; i < setSpan; i++ ) {
-        this.masonryHorizontal.rowXs[ smallRow + i ] = setWidth;
+        this.masonryHorizontal.rowXs.push( this.posLeft );
       }
-
     },
-    
+  
     _masonryHorizontalLayout : function( $elems ) {
       var instance = this;
       $elems.each(function(){
@@ -1059,7 +1021,7 @@
 
         if ( rowSpan === 1 ) {
           // if brick spans only one column, just like singleMode
-          instance._masonryHorizontalPlaceBrick( $this, instance.masonryHorizontal.rows, instance.masonryHorizontal.rowXs );
+          instance._masonryHorizontalPlaceBrick( $this, instance.masonryHorizontal.rowXs );
         } else {
           // brick spans more than one row
           // how many different places could this brick fit horizontally
@@ -1075,44 +1037,50 @@
             groupX[i] = Math.max.apply( Math, groupRowX );
           }
 
-          instance._masonryHorizontalPlaceBrick( $this, groupCount, groupX );
+          instance._masonryHorizontalPlaceBrick( $this, groupX );
         }
       });
-      return this;
     },
     
-    _masonryHorizontalReset : function() {
-      // layout-specific props
-      this.masonryHorizontal = {};
-      // FIXME shouldn't have to call this again
-      this._getSegments( 'masonryHorizontal', true );
-      var i = this.masonryHorizontal.rows;
-      this.masonryHorizontal.rowXs = [];
+    _masonryHorizontalPlaceBrick : function( $brick, setX ) {
+      // here, `this` refers to a child element or "brick"
+          // get the minimum Y value from the columns
+      var minimumX  = Math.min.apply( Math, setX ),
+          setWidth  = minimumX + $brick.outerWidth(true),
+          i         = setX.length,
+          smallRow  = i,
+          setSpan   = this.masonryHorizontal.rows + 1 - i,
+          x, y ;
+      // Which column has the minY value, closest to the left
       while (i--) {
-        this.masonryHorizontal.rowXs.push( this.posLeft );
+        if ( setX[i] === minimumX ) {
+          smallRow = i;
+        }
       }
-      return this;
-    },
-    
-    _masonryHorizontalResize : function() {
-      var prevRows = this.masonryHorizontal.rows;
-      // get updated colCount
-      this._getSegments( 'masonryHorizontal', true );
-      if ( this.masonryHorizontal.rows !== prevRows ) {
-        // if column count has changed, do a new column cound
-        this.reLayout();
+
+      // position the brick
+      x = minimumX;
+      y = this.masonryHorizontal.rowHeight * smallRow + this.posTop;
+      this._pushPosition( $brick, x, y );
+
+      // apply setHeight to necessary columns
+      for ( i=0; i < setSpan; i++ ) {
+        this.masonryHorizontal.rowXs[ smallRow + i ] = setWidth;
       }
 
-      return this;
     },
-    
+
     _masonryHorizontalGetContainerSize : function() {
       var containerWidth = Math.max.apply( Math, this.masonryHorizontal.rowXs ) - this.posLeft;
       return { width: containerWidth };
     },
+    
+    _masonryHorizontalResizeChanged : function() {
+      return this._checkIfSegmentsChanged(true);
+    },
 
 
-  // ====================== fitColumns ======================
+    // ====================== fitColumns ======================
   
     _fitColumnsReset : function() {
       this.fitColumns = {
@@ -1120,7 +1088,6 @@
         y : 0,
         width : 0
       };
-      return this;
     },
     
     _fitColumnsLayout : function( $elems ) {
@@ -1147,86 +1114,79 @@
         instance.fitColumns.y += atomH;
 
       });
-      return this;
     },
     
     _fitColumnsGetContainerSize : function () {
       return { width : this.fitColumns.width };
     },
     
-    _fitColumnsResize : function() {
-      return this.reLayout();
+    _fitColumnsResizeChanged : function() {
+      return true;
     },
     
 
   
-  // ====================== cellsByColumn ======================
+    // ====================== cellsByColumn ======================
   
     _cellsByColumnReset : function() {
-      this.cellsByColumn = {};
-      this._getSegments( 'cellsByColumn', true );
-      this.cellsByColumn.columnWidth = this.options.cellsByColumn.columnWidth || this.$allAtoms.outerHeight(true);
-      return this;
+      this.cellsByColumn = {
+        index : 0
+      };
+      // get this.cellsByColumn.columnWidth
+      this._getSegments();
+      // get this.cellsByColumn.rowHeight
+      this._getSegments(true);
     },
 
     _cellsByColumnLayout : function( $elems ) {
       var instance = this,
-          rows = this.cellsByColumn.rows;
-      this.cellsByColumn.atomsLen = $elems.length;
-      $elems.each( function( i ){
+          props = this.cellsByColumn;
+      $elems.each( function(){
         var $this = $(this),
-            x = ( ~~( i / rows ) + 0.5 )  * instance.cellsByColumn.columnWidth -
+            col = ~~( props.index / props.rows ),
+            row = props.index % props.rows,
+            x = ( col + 0.5 )  * props.columnWidth -
                   $this.outerWidth(true) / 2 + instance.posLeft,
-            y = ( i % rows + 0.5 ) * instance.cellsByColumn.rowHeight -
+            y = ( row + 0.5 ) * props.rowHeight -
                   $this.outerHeight(true) / 2 + instance.posTop;
         instance._pushPosition( $this, x, y );
+        props.index ++;
       });
-      return this;
     },
 
     _cellsByColumnGetContainerSize : function() {
-      return { width : Math.ceil( this.cellsByColumn.atomsLen / this.cellsByColumn.rows ) * this.cellsByColumn.columnWidth + this.posLeft };
+      return { width : Math.ceil( this.$filteredAtoms.length / this.cellsByColumn.rows ) * this.cellsByColumn.columnWidth + this.posLeft };
     },
 
-    _cellsByColumnResize : function() {
-      var prevRows = this.cellsByColumn.rows;
-      this._getSegments( 'cellsByColumn', true );
-
-      // if column count has changed, do a new column cound
-      if ( this.cellsByColumn.rows !== prevRows ) {
-        this.reLayout();
-      }
-      return this;
+    _cellsByColumnResizeChanged : function() {
+      return this._checkIfSegmentsChanged(true);
     },
     
     // ====================== straightAcross ======================
 
-      _straightAcrossReset : function() {
-        this.straightAcross = {
-          x : 0
-        };
-        return this;
-      },
+    _straightAcrossReset : function() {
+      this.straightAcross = {
+        x : 0
+      };
+    },
 
-      _straightAcrossLayout : function( $elems ) {
-        var instance = this;
-        $elems.each( function( i ){
-          var $this = $(this),
-              x = instance.straightAcross.x + instance.posLeft;
-          instance._pushPosition( $this, x, instance.posTop );
-          instance.straightAcross.x += $this.outerWidth(true);
-        });
-        return this;
-      },
+    _straightAcrossLayout : function( $elems ) {
+      var instance = this;
+      $elems.each( function( i ){
+        var $this = $(this),
+            x = instance.straightAcross.x + instance.posLeft;
+        instance._pushPosition( $this, x, instance.posTop );
+        instance.straightAcross.x += $this.outerWidth(true);
+      });
+    },
 
-      _straightAcrossGetContainerSize : function() {
-        return { width : this.straightAcross.x + this.posLeft };
-      },
+    _straightAcrossGetContainerSize : function() {
+      return { width : this.straightAcross.x + this.posLeft };
+    },
 
-      _straightAcrossResize : function() {
-        this.reLayout();
-        return this;
-      }
+    _straightAcrossResizeChanged : function() {
+      return true;
+    }
 
   };
   
@@ -1278,7 +1238,7 @@
       // call method
       var args = Array.prototype.slice.call( arguments, 1 );
 
-      return this.each(function(){
+      this.each(function(){
         var instance = $.data( this, 'isotope' );
         if ( !instance ) {
           return $.error( "cannot call methods on isotope prior to initialization; " +
@@ -1291,17 +1251,21 @@
         instance[ options ].apply( instance, args );
       });
     } else {
-      return this.each(function() {
+      this.each(function() {
         var instance = $.data( this, 'isotope' );
         if ( instance ) {
           // apply options & init
-          instance.option( options || {} )._init();
+          instance.option( options || {} );
+          instance._init();
         } else {
           // initialize new instance
           $.data( this, 'isotope', new $.Isotope( options, this ) );
         }
       });
     }
+    // return jQuery object
+    // so plugin methods do not have to
+    return this;
   };
 
 })( window, jQuery );
\ No newline at end of file
diff --git a/jquery.isotope.min.js b/jquery.isotope.min.js
index 3c6b01c..da04be3 100644
--- a/jquery.isotope.min.js
+++ b/jquery.isotope.min.js
@@ -1,5 +1,5 @@
 /**
- * Isotope v1.2.110520
+ * Isotope v1.3.110523
  * An exquisite jQuery plugin for magical layouts
  * http://isotope.metafizzy.co
  *
@@ -8,4 +8,4 @@
  *
  * Copyright 2011 David DeSandro / Metafizzy
  */
-(function(a,b,c){var d=function(){function b(b,c){c=c||document.documentElement;var d=c.style,e;if(typeof d[b]=="string")return b;b=b.charAt(0).toUpperCase()+b.slice(1);for(var f=0,g=a.length;f<g;f++){e=a[f]+b;if(typeof d[e]=="string")return e}}var a=["Moz","Webkit","Khtml","O","Ms"];return b}(),e=d("transform"),f=document.documentElement,g=" -o- -moz- -ms- -webkit- -khtml- ".split(" "),h=[{name:"csstransforms",getResult:function(){return!!e}},{name:"csstransforms3d",getResult:function(){var a=!!d("perspective");if(a){var b=document.createElement("style"),c=document.createElement("div"),e="@media ("+g.join("transform-3d),(")+"modernizr)";b.textContent=e+"{#modernizr{height:3px}}",(document.head||document.getElementsByTagName("head")[0]).appendChild(b),c.id="modernizr",f.appendChild(c),a=c.offsetHeight===3,b.parentNode.removeChild(b),c.parentNode.removeChild(c)}return!!a}},{name:"csstransitions",getResult:function(){return!!d("transitionProperty")}}],i,j=h.length;if(a.Modernizr)for(i=0;i<j;i++){var k=h[i];Modernizr.hasOwnProperty(k.name)||Modernizr.addTest(k.name,k.getResult)}else a.Modernizr=function(){var a={_version:"1.6ish: miniModernizr for Isotope"},b=[],c,d,e;for(i=0;i<j;i++)c=h[i],d=c.getResult(),a[c.name]=d,e=(d?"":"no-")+c.name,b.push(e);f.className+=" "+b.join(" ");return a}();if(Modernizr.csstransforms){var l=Modernizr.csstransforms3d?{translate:function(a){return"translate3d("+a[0]+"px, "+a[1]+"px, 0) "},scale:function(a){return"scale3d("+a+", "+a+", 1) "}}:{translate:function(a){return"translate("+a[0]+"px, "+a[1]+"px) "},scale:function(a){return"scale("+a+") "}},m=function(a,c,d){var f=b(a),g=f.data("isoTransform")||{},h={},i,j={},k;h[c]=d,b.extend(g,h);for(i in g)k=g[i],j[i]=l[i](k);var m=j.translate||"",n=j.scale||"",o=m+n;f.data("isoTransform",g),a.style[e]=o};b.cssNumber.scale=!0,b.cssHooks.scale={set:function(a,b){typeof b=="string"&&(b=parseFloat(b)),m(a,"scale",b)},get:function(a,c){var d=b.data(a,"isoTransform");return d&&d.scale?d.scale:1}},b.fx.step.scale=function(a){b.cssHooks.scale.set(a.elem,a.now+a.unit)},b.cssNumber.translate=!0,b.cssHooks.translate={set:function(a,b){m(a,"translate",b)},get:function(a,c){var d=b.data(a,"isoTransform");return d&&d.translate?d.translate:[0,0]}}}var n=b.event,o;n.special.smartresize={setup:function(){b(this).bind("resize",n.special.smartresize.handler)},teardown:function(){b(this).unbind("resize",n.special.smartresize.handler)},handler:function(a,b){var c=this,d=arguments;a.type="smartresize",o&&clearTimeout(o),o=setTimeout(function(){jQuery.event.handle.apply(c,d)},b==="execAsap"?0:100)}},b.fn.smartresize=function(a){return a?this.bind("smartresize",a):this.trigger("smartresize",["execAsap"])},b.Isotope=function(a,c){this.element=b(c),this._create(a),this._init()};var p=["overflow","position","width","height"];b.Isotope.settings={resizable:!0,layoutMode:"masonry",containerClass:"isotope",itemClass:"isotope-item",hiddenClass:"isotope-hidden",hiddenStyle:Modernizr.csstransforms&&!b.browser.opera?{opacity:0,scale:.001}:{opacity:0},visibleStyle:Modernizr.csstransforms&&!b.browser.opera?{opacity:1,scale:1}:{opacity:1},animationEngine:b.browser.opera?"jquery":"best-available",animationOptions:{queue:!1,duration:800},sortBy:"original-order",sortAscending:!0,resizesContainer:!0,transformsEnabled:!0,itemPositionDataEnabled:!1},b.Isotope.prototype={_create:function(c){this.options=b.extend(!0,{},b.Isotope.settings,c),this.styleQueue=[],this.elemCount=0;var d=this.element[0].style;this.originalStyle={};for(var e=0,f=p.length;e<f;e++){var g=p[e];this.originalStyle[g]=d[g]||null}this.element.css({overflow:"hidden",position:"relative"}),this._updateAnimationEngine(),this._updateUsingTransforms();var h={"original-order":function(a,b){return b.elemCount}};this.options.getSortData=b.extend(this.options.getSortData,h),this.reloadItems();var i=b(document.createElement("div"));this.element.prepend(i),this.posTop=Math.round(i.position().top),this.posLeft=Math.round(i.position().left),i.remove();var j=this;setTimeout(function(){j.element.addClass(j.options.containerClass)},0),this.options.resizable&&b(a).bind("smartresize.isotope",function(){j.element.isotope("resize")})},_getAtoms:function(a){var b=this.options.itemSelector,c=b?a.filter(b).add(a.find(b)):a,d={position:"absolute"};this.usingTransforms&&(d.left=0,d.top=0),c.css(d).addClass(this.options.itemClass),this.updateSortData(c,!0);return c},_init:function(a){this.$filteredAtoms=this._filter(this.$allAtoms),this._sort(),this.reLayout(a)},option:function(a,c){if(b.isPlainObject(a)){this.options=b.extend(!0,this.options,a);var d;for(d in a)this._updateOption(d)}else{if(a&&typeof c=="undefined")return this.options[a];this.options[a]=c,this._updateOption(a)}return this},_updateOption:function(a){var b="_update"+a.charAt(0).toUpperCase()+a.slice(1);this[b]&&this[b]()},_updateAnimationEngine:function(){var a=this.options.animationEngine.toLowerCase().replace(/[ _\-]/g,"");switch(a){case"css":case"none":this.isUsingJQueryAnimation=!1;break;case"jquery":this.isUsingJQueryAnimation=!0;break;default:this.isUsingJQueryAnimation=!Modernizr.csstransitions}this._updateUsingTransforms()},_updateTransformsEnabled:function(){this._updateUsingTransforms()},_updateUsingTransforms:function(){this.usingTransforms=this.options.transformsEnabled&&Modernizr.csstransforms&&Modernizr.csstransitions&&!this.isUsingJQueryAnimation,this.getPositionStyles=this.usingTransforms?this._translate:this._positionAbs},_filter:function(a){var b,c=this.options.filter===""?"*":this.options.filter;if(!c)b=a;else{var d=this.options.hiddenClass,e="."+d,f=a.not(e),g=a.filter(e),h=g;b=a.filter(c);if(c!=="*"){h=g.filter(c);var i=f.not(c).toggleClass(d);i.addClass(d),this.styleQueue.push({$el:i,style:this.options.hiddenStyle})}this.styleQueue.push({$el:h,style:this.options.visibleStyle}),h.removeClass(d)}return b},updateSortData:function(a,c){var d=this,e=this.options.getSortData,f,g;a.each(function(){f=b(this),g={};for(var a in e)g[a]=e[a](f,d);f.data("isotope-sort-data",g),c&&d.elemCount++})},_sort:function(){var a=this.options.sortBy,b=this._getSorter,c=this.options.sortAscending?1:-1,d=function(d,e){var f=b(d,a),g=b(e,a);f===g&&a!=="original-order"&&(f=b(d,"original-order"),g=b(e,"original-order"));return(f>g?1:f<g?-1:0)*c};this.$filteredAtoms.sort(d);return this},_getSorter:function(a,c){return b(a).data("isotope-sort-data")[c]},_translate:function(a,b){return{translate:[a,b]}},_positionAbs:function(a,b){return{left:a,top:b}},_pushPosition:function(a,b,c){var d=this.getPositionStyles(b,c);this.styleQueue.push({$el:a,style:d}),this.options.itemPositionDataEnabled&&a.data("isotope-item-position",{x:b,y:c})},layout:function(a,c){var d=this.options.layoutMode;this["_"+d+"Layout"](a);if(this.options.resizesContainer){var e=this["_"+d+"GetContainerSize"]();this.styleQueue.push({$el:this.element,style:e})}var f=this.isLaidOut?this.isUsingJQueryAnimation?"animate":"css":"css",g=this.options.animationOptions;b.each(this.styleQueue,function(a,b){b.$el[f](b.style,g)}),this.styleQueue=[],c&&c.call(a),this.isLaidOut=!0;return this},resize:function(){return this["_"+this.options.layoutMode+"Resize"]()},reLayout:function(a){return this["_"+this.options.layoutMode+"Reset"]().layout(this.$filteredAtoms,a)},addItems:function(a,b){var c=this._getAtoms(a);this.$allAtoms=this.$allAtoms.add(c),b&&b(c)},insert:function(a,b){this.element.append(a);var c=this;this.addItems(a,function(a){var b=c._filter(a);c.$filteredAtoms=c.$filteredAtoms.add(b)}),this._sort().reLayout(b)},appended:function(a,b){var c=this;this.addItems(a,function(a){c.$filteredAtoms=c.$filteredAtoms.add(a),c.layout(a,b)})},reloadItems:function(){this.$allAtoms=this._getAtoms(this.element.children())},remove:function(a){this.$allAtoms=this.$allAtoms.not(a),this.$filteredAtoms=this.$filteredAtoms.not(a),a.remove()},_shuffleArray:function(a){var b,c,d=a.length;if(d)while(--d)c=~~(Math.random()*(d+1)),b=a[c],a[c]=a[d],a[d]=b;return a},shuffle:function(a){this.options.sortBy="shuffle",this.$allAtoms=this._shuffleArray(this.$allAtoms),this.$filteredAtoms=this._filter(this.$allAtoms);return this.reLayout(a)},destroy:function(){var c=this.usingTransforms;this.$allAtoms.removeClass(this.options.hiddenClass+" "+this.options.itemClass).each(function(){this.style.position=null,this.style.top=null,this.style.left=null,this.style.opacity=null,c&&(this.style[e]=null)});var d=this.element[0].style;for(var f=0,g=p.length;f<g;f++){var h=p[f];d[h]=this.originalStyle[h]}this.element.unbind(".isotope").removeClass(this.options.containerClass).removeData("isotope"),b(a).unbind(".isotope")},_getSegments:function(a,b){var c=b?"rowHeight":"columnWidth",d=b?"height":"width",e=b?"Height":"Width",f=b?"rows":"cols",g,h;this[d]=this.element[d](),h=this.options[a]&&this.options[a][c]||this.$filteredAtoms["outer"+e](!0)||this[d],g=Math.floor(this[d]/h),g=Math.max(g,1),this[a][f]=g,this[a][c]=h;return this},_masonryPlaceBrick:function(a,b,c){var d=Math.min.apply(Math,c),e=d+a.outerHeight(!0),f=c.length,g=f,h=this.masonry.cols+1-f,i,j;while(f--)c[f]===d&&(g=f);i=this.masonry.columnWidth*g+this.posLeft,j=d,this._pushPosition(a,i,j);for(f=0;f<h;f++)this.masonry.colYs[g+f]=e},_masonryLayout:function(a){var c=this;a.each(function(){var a=b(this),d=Math.ceil(a.outerWidth(!0)/c.masonry.columnWidth);d=Math.min(d,c.masonry.cols);if(d===1)c._masonryPlaceBrick(a,c.masonry.cols,c.masonry.colYs);else{var e=c.masonry.cols+1-d,f=[],g,h;for(h=0;h<e;h++)g=c.masonry.colYs.slice(h,h+d),f[h]=Math.max.apply(Math,g);c._masonryPlaceBrick(a,e,f)}});return this},_masonryReset:function(){this.masonry={},this._getSegments("masonry");var a=this.masonry.cols;this.masonry.colYs=[];while(a--)this.masonry.colYs.push(this.posTop);return this},_masonryResize:function(){var a=this.masonry.cols;this._getSegments("masonry"),this.masonry.cols!==a&&this.reLayout();return this},_masonryGetContainerSize:function(){var a=Math.max.apply(Math,this.masonry.colYs)-this.posTop;return{height:a}},_fitRowsLayout:function(a){this.width=this.element.width();var c=this;a.each(function(){var a=b(this),d=a.outerWidth(!0),e=a.outerHeight(!0),f,g;c.fitRows.x!==0&&d+c.fitRows.x>c.width&&(c.fitRows.x=0,c.fitRows.y=c.fitRows.height),f=c.fitRows.x+c.posLeft,g=c.fitRows.y+c.posTop,c._pushPosition(a,f,g),c.fitRows.height=Math.max(c.fitRows.y+e,c.fitRows.height),c.fitRows.x+=d});return this},_fitRowsReset:function(){this.fitRows={x:0,y:0,height:0};return this},_fitRowsGetContainerSize:function(){return{height:this.fitRows.height}},_fitRowsResize:function(){return this.reLayout()},_cellsByRowReset:function(){this.cellsByRow={},this._getSegments("cellsByRow"),this.cellsByRow.rowHeight=this.options.cellsByRow.rowHeight||this.$allAtoms.outerHeight(!0);return this},_cellsByRowLayout:function(a){var c=this,d=this.cellsByRow.cols;this.cellsByRow.atomsLen=a.length,a.each(function(a){var e=b(this),f=(a%d+.5)*c.cellsByRow.columnWidth-e.outerWidth(!0)/2+c.posLeft,g=(~~(a/d)+.5)*c.cellsByRow.rowHeight-e.outerHeight(!0)/2+c.posTop;c._pushPosition(e,f,g)});return this},_cellsByRowGetContainerSize:function(){return{height:Math.ceil(this.cellsByRow.atomsLen/this.cellsByRow.cols)*this.cellsByRow.rowHeight+this.posTop}},_cellsByRowResize:function(){var a=this.cellsByRow.cols;this._getSegments("cellsByRow"),this.cellsByRow.cols!==a&&this.reLayout();return this},_straightDownReset:function(){this.straightDown={y:0};return this},_straightDownLayout:function(a){var c=this;a.each(function(a){var d=b(this),e=c.straightDown.y+c.posTop;c._pushPosition(d,c.posLeft,e),c.straightDown.y+=d.outerHeight(!0)});return this},_straightDownGetContainerSize:function(){return{height:this.straightDown.y+this.posTop}},_straightDownResize:function(){this.reLayout();return this},_masonryHorizontalPlaceBrick:function(a,b,c){var d=Math.min.apply(Math,c),e=d+a.outerWidth(!0),f=c.length,g=f,h=this.masonryHorizontal.rows+1-f,i,j;while(f--)c[f]===d&&(g=f);i=d,j=this.masonryHorizontal.rowHeight*g+this.posTop,this._pushPosition(a,i,j);for(f=0;f<h;f++)this.masonryHorizontal.rowXs[g+f]=e},_masonryHorizontalLayout:function(a){var c=this;a.each(function(){var a=b(this),d=Math.ceil(a.outerHeight(!0)/c.masonryHorizontal.rowHeight);d=Math.min(d,c.masonryHorizontal.rows);if(d===1)c._masonryHorizontalPlaceBrick(a,c.masonryHorizontal.rows,c.masonryHorizontal.rowXs);else{var e=c.masonryHorizontal.rows+1-d,f=[],g,h;for(h=0;h<e;h++)g=c.masonryHorizontal.rowXs.slice(h,h+d),f[h]=Math.max.apply(Math,g);c._masonryHorizontalPlaceBrick(a,e,f)}});return this},_masonryHorizontalReset:function(){this.masonryHorizontal={},this._getSegments("masonryHorizontal",!0);var a=this.masonryHorizontal.rows;this.masonryHorizontal.rowXs=[];while(a--)this.masonryHorizontal.rowXs.push(this.posLeft);return this},_masonryHorizontalResize:function(){var a=this.masonryHorizontal.rows;this._getSegments("masonryHorizontal",!0),this.masonryHorizontal.rows!==a&&this.reLayout();return this},_masonryHorizontalGetContainerSize:function(){var a=Math.max.apply(Math,this.masonryHorizontal.rowXs)-this.posLeft;return{width:a}},_fitColumnsReset:function(){this.fitColumns={x:0,y:0,width:0};return this},_fitColumnsLayout:function(a){var c=this;this.height=this.element.height(),a.each(function(){var a=b(this),d=a.outerWidth(!0),e=a.outerHeight(!0),f,g;c.fitColumns.y!==0&&e+c.fitColumns.y>c.height&&(c.fitColumns.x=c.fitColumns.width,c.fitColumns.y=0),f=c.fitColumns.x+c.posLeft,g=c.fitColumns.y+c.posTop,c._pushPosition(a,f,g),c.fitColumns.width=Math.max(c.fitColumns.x+d,c.fitColumns.width),c.fitColumns.y+=e});return this},_fitColumnsGetContainerSize:function(){return{width:this.fitColumns.width}},_fitColumnsResize:function(){return this.reLayout()},_cellsByColumnReset:function(){this.cellsByColumn={},this._getSegments("cellsByColumn",!0),this.cellsByColumn.columnWidth=this.options.cellsByColumn.columnWidth||this.$allAtoms.outerHeight(!0);return this},_cellsByColumnLayout:function(a){var c=this,d=this.cellsByColumn.rows;this.cellsByColumn.atomsLen=a.length,a.each(function(a){var e=b(this),f=(~~(a/d)+.5)*c.cellsByColumn.columnWidth-e.outerWidth(!0)/2+c.posLeft,g=(a%d+.5)*c.cellsByColumn.rowHeight-e.outerHeight(!0)/2+c.posTop;c._pushPosition(e,f,g)});return this},_cellsByColumnGetContainerSize:function(){return{width:Math.ceil(this.cellsByColumn.atomsLen/this.cellsByColumn.rows)*this.cellsByColumn.columnWidth+this.posLeft}},_cellsByColumnResize:function(){var a=this.cellsByColumn.rows;this._getSegments("cellsByColumn",!0),this.cellsByColumn.rows!==a&&this.reLayout();return this},_straightAcrossReset:function(){this.straightAcross={x:0};return this},_straightAcrossLayout:function(a){var c=this;a.each(function(a){var d=b(this),e=c.straightAcross.x+c.posLeft;c._pushPosition(d,e,c.posTop),c.straightAcross.x+=d.outerWidth(!0)});return this},_straightAcrossGetContainerSize:function(){return{width:this.straightAcross.x+this.posLeft}},_straightAcrossResize:function(){this.reLayout();return this}},b.fn.imagesLoaded=function(a){var b=this.find("img"),d=b.length,e=this;b.length||a.call(this),b.bind("load",function(){--d<=0&&a.call(e)}).each(function(){if(this.complete||this.complete===c){var a=this.src;this.src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==",this.src=a}});return this},b.fn.isotope=function(a){if(typeof a=="string"){var c=Array.prototype.slice.call(arguments,1);return this.each(function(){var d=b.data(this,"isotope");if(!d)return b.error("cannot call methods on isotope prior to initialization; attempted to call method '"+a+"'");if(!b.isFunction(d[a])||a.charAt(0)==="_")return b.error("no such method '"+a+"' for isotope instance");d[a].apply(d,c)})}return this.each(function(){var c=b.data(this,"isotope");c?c.option(a||{})._init():b.data(this,"isotope",new b.Isotope(a,this))})}})(window,jQuery);
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