I upgraded to 5.0.1, and in the blink of an eye, I lost control. I use external hardware via firewire for my audio out... 5.0.1 won't even start up when this device is turned on. When I turn the device off, or disconnect the firewire cable, itunes starts up just fine. Everything was peachy with 5.0 just minutes before the upgrade. I have made sure my sound output preferences are still routed to the external device, I've re-started, I've shut down, then I resorted to just banging my head against the wall... Any suggestions?