I did a clean install of 10.4 with all the updates on both machines via firewire disk mode from my Mini, and other than their respective issues they're running good. Forgot to mention both have airport cards, as well. Heavymetal, hold that thought...I'm thinking of trying to drop by an AppleStore and see if I can get the 12" fixed under the extended replacement program, since it does exhibit the scrambled video before death symptoms. Otherwise I may try to fix it myself.