on the german forum, there is a suspition, this problem would occur only after longer playsessions, and the EA community manager suggest to restart the console, to cleanup the cache, as he says. This should fix the problem, and it seems to work for some guys, but it's still not fully confirmed that it works for everyone)
and "restarting the console" means, you have to turn off the console (not sleepmode) and turn it on again.
I can't test it now, because i am far away from my playstation at the moment, but i think it's worth a try.
