ATI 5970 -horizontal line when in fullscreen crossfire

[Swev]

yes jovy and swev those both sound identical to the problem im having, it only happens in fullscreen for me though, in windowed mode when i on one card it goes away, thats odd that it would happen on the 4800, are you just running the one 4800? no second card?
Ive also tried forcing vsync etc. The only thing i havent tried that i saw posted somewhere else was trying a different monitor, i saw another guy having same problem as us and it turned out monitor was the problem.

I only have one card and i could see it as a monitor problem. I never changed any of my graphic settings ether. /shrugs. Also why is it only doing this in this game and not others. At least from what i can see.