We had an issue with the game being corrupt (shows as a grey image). We have gotten into the habit of copying the save game to provide us a backup in case that happened again. We opened Minecraft on the Xbox today and copied the game, after it finished copying then we launched our current game. It was in the process of loading and then 'crashed' to the Xbox Home screen. We then launched the game again and both the original save and the copy we just made were both corrupted. This was the second night in a row that the same thing has happened.