Playing tf2, most of the time it runs very smoothly in fullscreen, and even in windowed, but occasionally, for a few frames, it either cuts to a distorted view of my virtual desktop (when I'm using one) or just random fluorescent colors set at right angles to each other. Anyone know what is happening? I can't take screens because, well, it's not taking them. Solutions appreciated! Using ATI Radeon 3400 series, Catalyst 10.4 AMD Turion X2 Neo 64 1.6 ghz 4 gigs of ram.
