A week ago, I was watching a DVD on my 360. About 45 minutes through, the video started to get choppy. It wasn't fuzzy or anything, it just looked like it was stuttering. I turned it off, and thought it might have been a random glitch. Last night, my girlfriend put in a dvd from a Friends set, and it started off doing the same thing. After about a half hour, it stopped doing it and it was fine. Has this happened to anyone else? The disks are both fine, and they play great on everything else.