This is my story.. I know A LOT of peaple have been having this issue, but i'll tell what happend to me.
I bought my cod ghosts on the release date, i play on ps3, and i was playing with no problems at all until yesterday (14/12) what happend was that i was playing a TDM on Warhawk and my screen freezes, i press PS button but nothing happen, it crashed my ps3.. so i restarted it and went trying to play it again, and boom again crashed.. kept crashing and crashing all the day, so i went searching on the internet this issue, tryed to delete game data and download it back, didn't worked out.. at that point I couldn't play anything, SP, MP, ad extinction nothing was working it kept crashing my ps3.. So i deleted the game data and didnt downloaded it back,just went streight to extinction alone, crashed again.. I tryed to play campaign without the game data, it worked fine until the 4th mission then it froze, I waited some time and got back to the same mission, still without game data, i could play until the middle of the mission then is backed out with the message disc read error 'imagefile11', so I though maybe its only this mission so i went to the 5th mission, on the begining of it the message disc error 'imagefile13', I didn't knew what to do so i went searching some more, I did that thing that u had to delete game data, turn on your ps3 on safe mode and rebilding data base, then trying to download it again. I did that as i had the data base already deleted, i went for MP, I played a full TDM match on Whiteout, next match on Freight almost on the end it crashed again.. Sorry for my bad english.