http://bugs.winehq.org/show_bug.cgi?id=5340
------- Additional Comments From graham.hudspith@spiceisland.plus.com 2007-20-06 07:55 ------- Using wine 0.9.33 and source insight 3.50.0052, I've come across this problem too.
The solution (to make the menu-bar function again) is to open a file and then toggle the view of the file between windowed and maximised. After this, the menu-bar seems to become responsive again.
So, if the file opens windowed, maximise it. It it opens maximised, window-ise (sorry) it.
Opening a file is easy if you've already created a project and the Project Window comes up populated with your source files. Otherwise, use the file-open icon (this icon always appears to work) and open JUST ANY file.