Had a clanmember who switched to Vista too, and bingo, Jedi Academy wasn't working anymore.
I have no idea if it works for other games, but I told him to rightclick the exe of the game, and then
Open as/with >> Administrator. It worked for him, he got the game running, but once again, I don't know if it goes for all the games.
I'm sticking with XP for a while.
