I just starting having vid corruption for no good reason... was running 10.6 catalyst without using the 9.10 gl dll.. put on ultra 2.1, setup as per the setup guide (steam version).. everything was great.
Since,I have uninstalled 10.6 and installed 10.7...no dice. I can make the corruption go away by changing any of the graphics settings, even the toggle texture cache...
http://drop.io/hidden/vnbre0wx4dyynw...k0Ni1qcGc%253D
Catalyst AI: OFF
Mipmap detail: QUALITY
Antialiasing: edge detect 4x
Anisotropic filtering: APPLICATION Settings
Vertical Refresh: OFF
Triple Buffer: OFF
5770 XFX brand new (no O/C) running XP 32bit SP3.