I have a black MacBook, the last rev. before the aluminiums. I think. Anyway, using iPhoto or Firefox, it will simply just lock up. It's happened 5 or 6 times today. Yeah. I've had to reboot that many times. I listen closely and I can hear my hard drive grinding. The drive itself sounds healthy, and I run Windows 7 without any trouble. Woops. There it went again. Firefox just locks up for a few minutes, and the entire system refuses to budge, except for the mouse cursor. This is what Console says: 09-09-01 9:16:28 PM GrowlHelperApp *** __NSAutoreleaseNoPool(): Object 0x454650 of class __NSFastEnumerationEnumerator autoreleased with no pool in place - just leaking I killed GrowlHelperApp. Woops. There it went again, for about 5 minutes. I didn't want to lose all that I typed. I'll finish this here just in case it happens again. Yes I have verified my disk, yes I have repaired permissions. Yes I did a clean install of Snow Leopard.