And btw, I also tried and confirmed wat Shaker said above: enabling hardware acceleration in fullscreen mode will dramatically decrease FPS to 3.

Every issue discussed in this thread has to do with fullscreen. I wonder if other games using JJ2's engine have the same problem, and what about other games that rely on good old DirectDraw for fullscreen mode? I will experiment a bit as soon as I'm on my PC!

I kinda hope the problem is just with DDraw mode, that way other game communities might make a universal DDraw fix before we know it.