I've spent last days trying to fix several problem with latest ATI driver. I've post a lot of bugfix request for compiz screen corruption.

After changing a lot of xorg.conf parameter (without any visible effect) I've resolved all of my trouble: in this moment my laptop works with fglrx AND compiz enabled, for this goal I've removed

Load "i2c"

from my module section. I hope that this information can help...