ATi released a new set of Linux drivers.

Issues Resolved: Doom 3: Random polygons no longer appear throughout the display while playing the game
3D Applications no longer fail to respond on RHEL 3.0 with 1GB or more memory installed
The System no longer fails to respond when moving the mouse around on the screen on some systems

Download: ATI Proprietary Linux Driver 3.14.6

Release notes:

Thanks goes to Pr()ZaC.