Some Games and Applications appear very blurred with new video card.

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So I just installed a new video card (An MSI 6850 1GB), and after installing the latest drivers and rebooting, I noticed that a lot of games and applications are very blurry, almost to the point that I can't see what is on the screen; whilst some other games and applications are fine.

For example, I usually use Firefox, but I am typing this on Chrome because Firefox is almost unreadable now, whilst Chrome is as it always was. And Fallout 3 and Bad Company 2 look fine, whilst ArmA 2 appears quite blurred.

Does anyone know what could be causing this?

[PopLot]

Don't worry I figured it out, Morphological Antialiasing was causing my problems.