So I go to play Tetris one day, which has always worked fine, and the iPod tells me "This game cannot be played. Connect to iTunes and reinstall." So I remove it from my library, sync iPod, put it back in the library, sync iPod again, and it still doesn't work. I have a 5.0G iPod and recently updated to 1.2.1 software, so maybe the update has something to do with it?