diff --git a/demo/cabaret/static/js.js b/demo/cabaret/static/js.js
index 8201537..41d7b41 100644
--- a/demo/cabaret/static/js.js
+++ b/demo/cabaret/static/js.js
@@ -19,8 +19,11 @@ function resend() {
     }
     $('.data .controls').each(function () {
         var label = $(this).find('.serie-label').val(),
-            values = $(this).find('.serie-value').val();
-        vals.push([label, values.split(',').map(function (v) { return parseFloat(v); })]);
+            values = $(this).find('.serie-value').val(),
+            lst = [label, values.split(',').map(function (v) { return parseFloat(v); })];
+        if (values != "") {
+            vals.push(lst);
+        }
     });
     var t = new Date().getTime();
     $.ajax({
diff --git a/pygal/__init__.py b/pygal/__init__.py
index c0eab56..b186008 100644
--- a/pygal/__init__.py
+++ b/pygal/__init__.py
@@ -21,7 +21,7 @@ Pygal -  A python svg graph plotting library
 
 """
 
-__version__ = '0.12.0'
+__version__ = '0.12.1'
 import sys
 from pygal.config import Config
 from pygal.ghost import Ghost