Whenever I aim with any gun, I get this weird white/black graphical corruption glowing thing... this never happened before. I updated my graphic drivers (before) and also changed a few things in the options - though nothing major. Seems like this might have been caused by the driver update, but then wouldn't the whole game look horrible?
My specs are okay, I run on 1GB ram, 3 GhZ, nVidia 8400 GS - game is normal usually.
Roll back the driver.