I too have had issues recetnly, though i can't say for certain it started after the 1-10-2006 update. My PC's firewire port stopped working, i confirmed this by plugging in an external DVD drive and that also failed to show up. So i replaced the sound card (Audigy with FW400 port) with a USB2.0/FW400 port from newegg.com. Now when i plug in my iPod with FW it does not show up in iTunes, and iTunes prompts me to run the updater to do a restor. I try to do that, but it says it fails to mount the iPod. In device manager the iPod has a "!" with a code ten error saying something about a communication failure. By the way the iPod does work when using USB2.0 and my external FW DVD burner works. Any ideas?