Anyone read or seen anything about this? Two things come to mind for me. One, some G5s had a bad buzzing noise that was apparently coming from the power supply unit. It took several PSU revisions to kill this problem, but I though I'd read about some who never saw the problem go away. Two, external I/O issues. BareFeats clearly showed that the G5 had a seriously bottleneck that hurt FireWire and USB transfer speeds. A FW 800 G4 easily outpaced the G5 on these fronts, even on a PCI card. Has anyone seen anything about either of these?