seems i have this problem now . it started happening about 2 weeks ago with 2.5 patched to 2.5.1 . since then i have reformatted and downloaded 2.5.1 build .also when it crashes my desktop has high contrast . no screen saver on .i can play up to about 3 maps before this happens. 4200+ i dont understand why it started happening all of a sudden .
win xp ,nvidia6100 integrated , amd 64x2 4200+, 2.2ghz .