Please provide a small working example of your layout so we can review your code.
Ok thanks. Log in with admin/district:
The GUI part starts at line 2362:
The 4.0.7 version here (same username/password):
Please try to resize the browser window and see how the panels and multiselects on the left resize themselves. I might have done that too complicated. The solution to the 4.1 problem could be simple. Any comments appreciated.