No idea, but I'm eagerly awaiting for them to patch this crap up so I can at least play the game. I'm locked out of the game, aside from the start menu and opening movie :/
I was too, until someone told me of a work around.
Put your file on a memory stick, load the game, wait for the saving to end, remove stick, click continue, play until you need to save again, then put the stick back in(giggety) go to options to choose storage device(pick memory stick of course) then save and quit.
Don't worry if the game freezes halfway through the saving icon, just power off and start the game up and your save file wil be there.
You might wanna back it up though, just in case.
But this is the way I've been playing for a week now and its working. I can't use xbox live though because that way the game won't even make it to the main screen without freezing.