game crashes after intro

[GroteBlup]

With fgrlx 8.3 I had render glitches, *UNTIL* I put pixelshaders on max/high quality.
I have an r420/X800 PRO (club 3d X850 something), a 2GHz athlon, and I am running debian/Sid.

I needed the latest versions though: overture version is 2553. The demo and the official game are very playable in highest quality settings (and easy of course, since else I just would have played doom3 ;-0 ) , and black plague (demo only) version 2567.
If I don't max the pixel shaders, I get very anoying render glitches.
The previous (overture) demo version was a good way to (bus)lock my system.