New aluminum iMac 24" - texture problems

[Gazbrad]

Yeah I've got a iMac 24" as well with all the same symptoms. Texture going crazy etc. and changing texture preferences doesn't do a thing.

I've lived with it up until a certain part of the game where I'm in the Excavation spiders tunnel. Now I'm stumped because I can't see where I'm going because of the floor texture. I guess it's supposed to be just a floor with maybe fog, who knows, but as soon as I go downstairs I get blown sky high.

This is a great game guys but at this stage my iMac graphics card doesn't like it. Help! I'd love to carry on.

For reference this is the iMac's graphics capabilities. Is it enough?

ATI Radeon HD 2600 Pro:

Chipset Model: ATI,RadeonHD2600
Type: Display
Bus: PCIe
PCIe Lane Width: x16
VRAM (Total): 256 MB
Vendor: ATI (0x1002)
Device ID: 0x9583
Revision ID: 0x0000
ROM Revision: 113-B2250F-219
EFI Driver Version: 01.00.219