So last Wednesday I stayed up late and played with the WC crew...long session of gaming...no problems. The next night I logged on to play and had the game freeze up on me once as I was joining a game...logged on again on Friday and had it froze up a whole bunch, couldn't even get the party screen to load. It seemed really odd to me that all of a sudden I was having problems with a game that hadn't left my PS3 in over a week and worked fine the whole time. No big deal, probably an IW thing, I will be away for the weekend and come back to it being fixed...wrong...froze up first game that I tried to join last night. Restart it, and as it's loading multiplayer screen it gives me a "disc read error" message...first time I've seen it...
I pull the disc out and flip it over and there are 3 little tiny greasy fingeprints scattered on it's belly...dang kids had been pulling MW3 out and playing blops combat training and goobered the disc up a bit. I've never really had a problem with other discs playing with a bit of crap on them...but this one does...only intermittently of course...
Long story short, if your game is freezing up a lot check your disc...a dirty disc will freeze up without an error message...