Compiz: Shades of window borders stay

[asdir]

When I hover over certain items (icons, tasks) or use the Ubuntu main menu, the "windows" (you hopefully know what I mean) leave the shades of their borders sometimes. They only disappear when I open the same "window" again. See for yourself at:

http://picasaweb.google.com/dirkroettgers/Testalbum/photo#5120472965121340322

Any suggestions? I have that for at least 3 updates now.

[asdir]

Well, doesn't happen with Gutsy anymore. Case closed ;-)