Thanks for that info. I do turn the console on and off with the game in. Luckily it is only happening with one disc and hopwfully it wont happen with the others. I can still play the game, but one or two of the tracks(Forza 2) will make the game freeze and sometimes the track will disappear and I will be driving in mid air. If I want to get a new one, it is only $20 bucks now so it isn't too bad.
Yes I have heard of the rrod. I have never had that problem in the year that I have had it. I dont really play it that often, maybe two or three times a week, so I dont think it has a chance to overheat. Maybe I will try to make it happen before the three year warranty is up.