Comment 3 for bug 1067525

I was able to figure out a little more about it. When I said it wasn't working before, basically it wouldn't show anything but a blank desktop after you logged in. The right click menu still worked, as well as the settings and stuff from there.

I was finally able to get it back by removing the catalyst drivers following the instructions here:
http://ubuntutechnical.wordpress.com/2011/11/20/install-ati-official-drivers-in-ubuntu/

 Then reinstalling the fglrx by running
sudo apt-get fglrx