Hi Eran,
I am having a similar problem, however, only in IE8 and IE7. The problem is when loading the add / edit event panel. It displays the loading event information, but, then doesn’t display the form. This works fine in Firefox and in IE9.
This is a screenshot of what happens when you click add / edit event.
https://x-v.it/dbumzk
I did already try the javascript hack and that didn’t make a change.
I have already tried disabling other plugins and themes, doesn’t seem to help.
The javascript console does not have any errors.
Please let me know if you find anything out on this.
~Philip