F16 upgrade, Gnome fails with Oh no! Something went wrong

[Deron Meranda]

I've upgraded from Fedora 15 to 16 (x86_64). Now when I attempt to
login using the Gnome shell, it brings up a small window with a
message "Oh no! Something went wrong", and after a few seconds returns
to the login screen. I can login fine using the Xfce or WindowMaker
sessions.

I then attempted to just clear out my user's gnome configuration, by

cd $HOME
mkdir old
mv .gnome* .gconf* old/

then attempted to login again. It re-created the .gnome2 directory and
such, but I still get the Oh no! error.

I was using Gnome just fine under Fedora 15 prior to the upgrade. Does
anybody know of a resolution to this problem -- or where I can find
any log files or more information about what went wrong that I can
look at?

Thanks
-- 
Deron Meranda
http://deron.meranda.us/