Blurry graphics

[Blackhand]

Loving the game but man this really gets to my eyes after a while.

It looks like the original "take damage" blur effect from Painkiller, but it just fails to dissapear and sits there for as long as 30 seconds, making it very difficult to see anything at medium to long range. Then, the effect just vanishes, it doesn't fade away, it looks like a reset to normal state.

I'll try running the game as administrator, but I'm on Vista and have UAC disabled, so I doubt this is the problem. I have FRAPS installed aswell, I'll try exiting it before playing and see if that helps.