Today after downloading the update, an error code came up saying my disc was unreadable. I went ahead and cleaned the disc (it's in great condition), and restarted my xbox 360. I can get to the start screen, and press "a" to continue. After a couple minutes, I get the error code again. I tried other games and they work just fine. I tried clearing the cache 3 times and reinstalling the game. Still getting the message. I contacted a volunteer at xbox support and they said it was probably due to the update... So has anyone else had this issue? I also contacted an employee at xbox (on their chat) and they told me to try the disc in another console.. So that's what I'm currently doing (but it has to download the update as well...).