I'm having sorta the same problem that Kixum is having. I'm running a P4 2.0Ghz 512Mgs RAM and a Geforce 3 TI 200. I belive it has something to do with the OpenGL interface. The first thing that happens when everything starts to go nutty is one of the preview panes doesn't render, then if I dont save right there and exit; the next problem is that all the clickable items start to fail and then the program just crashes. It doesn't lock-up my system because Win2K kills the app before that. I really hope they get a patch for that, I can't stand the software or the DirectX sub system because it is too slow. Kryoclasm