[Breezy] Can't log out or shut down

[S. Donig]

> If I click on the Gnome applet, I can no longer use any of the Gnome
> menus or applets, but nothing pops up to let me choose log out, shut
> down, etc. 
> 
> If I use the menus, System -> Log Out, the same thing  happens.
You don't happen to run xcompmgr, do you?
If so, it's a well known issue (bug?).
Just press return and you should log out or disable xcompmgr in this
case.