Comment 3 for bug 776445

happens for me too - doing almost anything in ccsm causes the top panel, or the launcher icons or both to become corrupt or invisible. Only a logout/login or a "compiz --replace" causes them to be restored (the latter also causing all desktops to become shuffled and all terminal windows to be resized and relocated). It happens so often, it's almost impossible not to trigger it.

Another good one is changing the ccsm setting for which windows have shadows drawn (Window Decoration -> Shadow Windows). I don't want shadows on my conky window, but changing it from the default "any" to pretty much anything else causes compiz to crash and restart not just once, but every time a popup menu is displayed plus several other events. Worked fine in all previous releases.

Staggers me how much stuff is now just being rushed into Ubuntu with little to no testing :(