bluesinG on 15 July 2010
I suspect it's an issue with your video card. In general, NVIDIA cards don't have very good compatibility with older games.
When I played Planescape: Torment a couple of years ago, I had to install an older driver for my 8600GT to eliminate graphical glitches and occasional crashes. When I played Shogun: Total War earlier this year, I had to completely remove the 8600GT and use my computer's integrated Intel graphics card to play at all.
