Boardwise has said this has happened to him too. everytime i put the disc for AC in my 360, it says unplayable disc. i have to then open and close my tray until it loads. last night it took about 20 minutes of open/closing my disc tray till the game started up. the disc has no scratches, and all my other games work ok, except for virtua fighter 5 which does the same thing. anyone else having this problem?