Comment 5 for bug 735162

I use fvwm and xcompmgr -c instead of compiz, but I have been getting this problem very often since updating to Natty Narwhal. It seems to happen most often after unlocking the screen with gnome-screensaver. Once it does all application menus, including those of gnome-panel, emacs, and most annoyingly firefox, appear behind any other windows. This also happens with gnome-screensaver's login window. Many times I thought my laptop was frozen and rebooted before I realized I just had to type my password and hit return.

So it is not strictly a compiz bug, but its severity is much worse than "medium"!