I've had my 80 gig PS3 for about a week now and I love it, but it gave me quite a scare tonight. I was playing Persona 3 and I was about to quit, so I saved. When it brought up the save screen my save file was gone (I just save on that first slot). It also wasn't letting me save on the first slot, so I tried the second. It worked. I backed out of the game and went to the memory card from the XMB. At the very bottom, there were two Corrupted Data blocks. They couldn't be deleted, so I copied my important game saves to yet another internal card and just completely deleted the one with the corrupted data. I also noticed it do something similar the other day when I was playing Odin Sphere (perhaps why there were two corrupted blocks?).
Now I've never had any problems in the past with corrupted data showing up. I've always been extremely careful about letting games finish accessing/saving to the memory cards before I do anything, such as shutting down. Is this just kind of a glitch in the backwards compatibility? Has anyone else had something similar happen?
After all of the work I've put into my P3: FES file, I don't want to loose it. lol.