Problems running post effects

#1 Edited by Vigorousjammer (2385 posts) -

hey guys, I recently downloaded the Penumbra games on Steam during the sale they were having... and I'm having a problem with Penumbra: Overture
 
The game itself runs fine and everything... but as soon as I turn on post-processing effects it gives me this weird effect where the rendered game looks fine, but all of the effects being overlayed are split in two, on the bottom and top half of the screen.
 
I'm running Vista 32 and I've got a 512mb Geforce 7600GS... anybody know what the problem is?

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