I just jailbroke my fat ps3, downgraded from 3.55 to 3.41 with ps3break dongle. I played AC2 Brotherhood smoothly for past two days but when I tried to play without a BD in the ps3, i got into the game but the saves were gone and the ps3 froze after i tried to go to menu and quit game.
So I had to force shut down, but when i turned it back on, the games, music and everything else, except the setting menu, were stuck at loading forever. Tried to reset, restore, format, but none worked.
oh and btw, when its shutting off, the green light flashes for a while then beeps three times before lights went red.
GOT IT SOLVED! apparently, it IS caused by playing AC2 without a BD. For those who might have the same problem, try:
1. Go to recovery mode - turn off your system, then keep holding the power button until it shuts off. Now hold the power button again, this time wait till you hear three beeps in total- 1 beep + 2 consecutive beeps
2. Restore file system
3. Go to recovery mode again and this time choose : Rebuild database!
Precious Lesson: don't ever, try play AC2B without a BD ever EVER again!