this happened to me to a couple days after release. I have no visible scratches on my CD, its been in my xbox since I bought it and my xbox hasnt been touched, so it's highly unlikely its scratched. It was in every game I played but only to me. my friends said everything looked normal, even in killcams if I'd kill them or whatever, just mine only. I restarted my xbox and it stayed so I restarted again, put in MW2 played a game and then put in BO and it went back to normal. have no idea what it's from but my box isnt flashed and the disc is seemingly PERFECT. maybe just a bad burn from the factory??