The issues displayed below are mainly because when some companies (especially ATI) put out new Versions of their drivers they do a lot of non standard things that can cause other problems, we have the same problem from time to time with new Versions of DirectX.
We have run the game under a large subset of machines and have not had a problem with the current Version and demo of the game. Make sure to download the demo from our site as it is the newest.
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Sarge is coming...
Richard Arnesen
Director of Covert Ops
Shrapnel Games
http://www.shrapnelgames.com