Hi all, I upgraded my Macbook Pro to 10.5.7 via Software Update, and after that I cannot log in anymore! The system boots fine, I land on the log in screen. After entering the password, it seems to be logging in, I can see the dashboard and everything, and then it automatically logs out and jumps back to the log in screen! I searched on Apple Support and found this -> http://support.apple.com/kb/TS1543?viewlocale=en_US, changing the password in single user mode doesn't work either! Hope you guys know what's going on and give me a hand! I tried to contact Apple Support but they said my AppleCare is expired and won't help! Thanks guy!