Quote Originally Posted by sebbio View Post
And I can confirm that this is happening with my application as well, and that the workaround Holger does not help.
Try to write
PHP Code:
try{}catch(e){} 
line directly into ext class, after the following lines:
PHP Code:
callOverrideParent = function () { // line 36 in ext-all-dev.js (4.1.1)
callParent: function(args) { // line 5885
callParent: function(args) { // line 6179 
It helped me.