I felt I had to register so I could add to this thread. I've been a long time lurker and these forums have helped me pick out most of the things in my living room, so first I just wanted to say thanks to everyone. But maybe some of my info can help us narrow down this issue, or at the very least add another tally to the "WTF" column. Now on to the juicy stuff...
I recently bought a used 40gig ps3 off ebay, I've had it probably a week and a half. And what do I get for getting one off ebay? Well I get this insanely frustrating syncing issue of course. And while I can't be sure, I am leaning toward it being a firmware problem. Because for the first few days I played it without issue, but then I updated to the newest firmware and only then did I start having problems. It was strange because my first guess was overheating, since the first sign of trouble was it actually freezing during a blu-ray playback. Ever since then though, it's been this unsyncing problem. They could be unrelated, but maybe not. Once the controllers do unsync, the game will continue on, so will the music, but both controllers can't be synced back to the system without a reboot.
And the second controller isn't even bluetooth. It's a Logitech controller that has a little wireless USB dongle. Even it won't sync once the regular bluetooth controller randomly stops. The issue usually happens after a few hours of play, and has maybe happened 6-10 times in the last week and a half, but I'm afraid it's only going to get worse. It seems like most of you here have tried just about everything (formatting, restoring defaults, hard reboots, different controllers, etc.) so the situation seems pretty grim. I think I'm going to try backing up my saved games and restoring everything to default nonetheless, because it did seem to work ok before the update. I don't know, maybe I just didn't play it long enough before I updated. The only thing I've tried so far is putting a box fan on it, but I'm pretty sure its magnetic field interfered because I couldn't get the controllers to sync even on startup with the fan nearby.
Oh well, that's all I've got so far, maybe some of the info is useful. But do you guys have any advice? It seems like since the 40gig only came out around 13 months ago, it might still be under warranty. Can Sony tell when the unit was purchased just by giving them a serial? And would they exchange without a receipt? I'm going to try and contact the seller to see when they purchased it, but they may or may not be helpful. I can still get a few hours of game play out of the system at a time, but it's still rather annoying, and if it ever gets worse it'll only get more frustrating. Guess I should have spent the extra $$ and gotten a new system (so this wouldn't happen until a year from now).