I had similar problems. Cursor jumped around, in some menus mouse didn't work at all. The game froze all the time. Couldn't drop ufo:s because one of the menus where the mouse froze totally was interceptor battle-window. Ahh, and yes.. the game was so fast it was unplayable, especially in battlescape. Well anyways installed turbo for the speed issue (http://www.xcomufo.com/turbo.zip) and surprisingly it ended all the problems. I set it in 40% and ran the game. Freezing has stopped. Mouse works in every menu, cursor moves smoothy enough, battlescape is still a bit fast but playable. If I drop the speed to 30%, the game starts freezing again and if I set it to 50% the game is too fast. 40% is the magic number for me. And yes, thanks BLADE! Excellent job! Blades patch + turbo = cure for vista