I swear this shit is started by the same people every firmware update. I'd wager XBOX fanboys trying to bring Sony down.
Sony tests the shit out of firmware before releasing it. They would test it out on every version of every console they've manufactured with stock and upgraded hard drives. Hell, I bet they even test it out on the PSOne and PS2. Stuff like this is tested out the wazoo before it's released to the wild.
Would you want to be the guy that says "Yeah, the firmware is good. I tested it out on this console. You can release it to the millions of PS3 users."? No way do they not confirm this stuff is good and then confirm it again and again...