I've been playing the first level on COD 5 for about the fourth time now. I go to load it and it says "ERROR - save game data is incompatible with the current version of the game. You may continue from the beginning of your most recent mission or exit to the menus" Either option I press doesn't do anything. The disk is brand new , it's on my XBOX 360. But people have also seen the issue on PS3. So don't even try to bring up how 360's suck. So what the f*** is up ? Anyone know what to do ?