Penumbra: Overture on 5870

[salama]

I have some weird graphical issues with the game on the that video card. First off, everything is on windows 7 64bit + latest catalyst drivers 10.2.
Well i here's a sum-up of the situation: some objects are not rendered properly, others are missing at all (only if i approach near them they appear). I have these strange purple-to-green dots showing up on walls. And to to top it off, some objects are cut off into triangles which change positions depending on the viewing angle. :eek: Odd explanation but yeah i have issues with the game being rendered by a 5870. All other games play and behave flawlessly.