27 Sep 2005 at 07:08 - 12
I have a feeling the problem is related directly to Nvidia cards when you minimize the game and maximize it. I own an ATI Radeon X800 Pro and that has never happened to me, and I almost ALWAYS minimize the game to check on a map for a mission.
Afterall, this is an ATI optimized game, so that could most likely be the case. Nvidia just needs to fix the problem directly through a new driver update.