Description of problem:
Starts with the Standard button focused. I have compiz and metacity installed, but not gnome-shell. If i hit the down arrow, it tells me it failed to launch gnome-shell. Likewise, clicking the Compiz button (and switching) and pressing Up triggers the same thing.
Version-Release number of selected component (if applicable):
Fix built in Koji as 0.8.4-2.fc12
Actually, a GTK+ bug (filed it upstream), but was easy to work around in desktop-effects.