Problem with x1900xt and crossfire

Since upgrading to the 6.5 drivers I have been seeing strange graphical glitches on games. For instance on Condemned the shadows seem to spike (see screenshot). I also get a similar problem on BF2 (Screen 1, Screen 2).

I've tried rolling back to 6.4 but that didn't work. Also, I tried plugging the monitor into the x1900xt to see if it was a fault with the master card, but it still has the same problem. The problem also occurs when crossfire is enabled.

Any suggestions for fixing this?

Specs:
AMD Athlon 64 X2 4800
Corsair 2GB DDR XMS3200C2PT TwinX
Radeon x1900 Crossfire Edition
Radeon x1900xt
Asus A8R32-MVP Deluxe
Antec TruePower 2.0 550W PSU

have you tried uninstalling all drivers and doing a clean, fresh install? Also try disabling all non-essential apps in the background. You may have something corrupted that is installed incorrectly. Check your mobo's bios settings too to ensure that it is configured right for xfire.

a fresh windows install could also be the issue... how long has it been since you reinstalled windows?

all just suggestions mind you, I do not have xfire so these are just steps that could be used for many problems.

At least you can run BF2, when i try it it gives me MASSIVE artifacts and i actually have to disable 1 of my cards just to be able to run it