No problems here. 6 different ones (all 400's) on 4 different Macs, including PowerBooks. -Bill On Nov 7, 2004, at 8:17 AM, stephenpassmore at mac.com wrote: > I've seen on macfixit.com that after upgrading to 10.3.6., some have > had problems mounting their Firewire hard drives. Seems like a repeat > of the old OS X / Oxford chipset problem. > > For those with Firewire HDs that have made the upgrade, what has been > your experience? I'm holding off updating my 10.3.5 PB for now...