Cheers noodle, sounds like a depth buffer precision issue to me will have a look.
Also does anything on this page looks dodgy?
Also, you hit 'i' to see some opengl info, and 'l' to see a log of messages being sent.
I don't see anything thats obvious
The logs were completely empty
Thanks for posting that, nothing pops out at me either but at least now I can compare your driver's caps/extensions ertc with mine and see if there's anything suspicious.