I recently did a software update on a 933 MHZ Quicksilver G4 running panther. Shortly after running the update I decided to plug in a firewire hard drive and grab some files from it. Once I plugged it in I noticed the spinning wheel and the menu bar was disappearing and reappearing over and over. I've run Norton Utilities, Disk Warrior and nothing has solved the problem. I really don't want to have to do a re-install of the OS. It just takes so long. Anything I can do before the OS install? I did just install a new 512 ram chip, new super drive and 300GB HD in the second slot. It was running fine for a day or so.