Up until about a week ago, this computer was running fine. I had completely removed *gags* Unity and gnome-screensaver, and was running gnome-shell with gnome 3 and compiz. Everything was dandy, but that all changed when the fire nation attacked (sorry, I couldn't resist).
In all seriousness, something must've gotten screwed up. The only system file I modified was gnome-shell.css in an effort to get my custom panel image to show under certain applets (like the hplip systray and notification applets). I successfully removed the black bar undertone, but that didn't help me much. For the past few days, Compiz has crashed randomly while I was in the middle of doing something. If I try to enable it again, my screen comes up garbled and scrambled. Not only that, but I have no window controls, and opening or closing anything results in an even more corrupted screen. Luckily, opening a terminal with Ctrl+Alt+t seems to stop it until I close something.
Ubuntu 12.04 Precise Pangolin (32-bit)
Ati Radeon 9250 Pro (using "radeon" driver)
Compiz is the latest version as of 7/18/12 15:20 EST
Metacity works without problems, but no compositing
Just recently, I did a partial upgrade after 'sudo apt-get install -f'. Now, Compiz doesn't start at login (I have 'compiz --replace &' set as a startup app), and I get the same problems as before. Compiz runs, but certain actions garble the screen. I have tried issuing a few TTY commands like the compiz unset command, but it did absolutely nothing.
A side note: before all of this happened, I would get random text and graphical corruption (nothing affecting the whole screen, but window titles and such).
I'm unsure on how to file bug reports (if this is one), but I do know where they are reported. Has anyone had these problems and been able to fix them, aside from a clean install?