diff -r 80859749e6b1 -r 0bad3613f59d src/cm/media/js/client/c_layout.js
--- a/src/cm/media/js/client/c_layout.js	Thu Sep 05 14:08:31 2013 +0200
+++ b/src/cm/media/js/client/c_layout.js	Wed Sep 11 23:13:01 2013 +0200
@@ -50,8 +50,8 @@
   },
   
   setLeftColumnWidth : function (colWidth) {
-    CY.one('#contentcolumn').setStyle('marginLeft', colWidth + 'px');
-    CY.one('#leftcolumn').setStyle('width', colWidth + 'px');
+    CY.get('#contentcolumn').setStyle('marginLeft', colWidth + 'px');
+    CY.get('#leftcolumn').setStyle('width', colWidth + 'px');
   },
   parentInterfaceUnfreeze : function() {
     if (this.isInFrame())