I have some game stopping problemgoes into game and all the textures messed up and follows me about (hard to explain) In otherwords it's impossible for me to play like it. I tried the latest driver (I got a 5830)
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A few people on the Steam forum said the following fixed the problem for them worth trying to see if it helps you
In catalyst controlcentre turn SMOOTHVISION HD Anti-Aliasing to Use application settings