I just bought Serious Sam, and I can't get into it because of this problem. There are textures flashing everywhere in the game, in the first level, triangles suddenly flash with a different texture, it's driving me nuts. I'm playing the game in 1024x768x32bit, v-sync is on, and quality is set to normal. I've tried lowering the AGP aperature size, but that did nothing. I looked on the Geforce faq about flashing textures, and most of this answers seem like stabs in the dark. Anyone have any ideas? My config is linked below. I'm using the 6.50 drivers for my geforce.