Hey folks, I did several searches and could find no help with this particular issue. I'm trying to upgrade my 3G running 3.1.whatever to iOS 4.1. To do this, I am using a 2 y.o. MacBook Pro and iTunes 10. In preparation for the upgrade, I did several syncs and allowed it to back up the phone completely each time. The most recent backup portion took less than 5 mins. Yet when I go to install the update (via the "Update" button, not "Restore"), it gets to the "Backing up 'iPhone'..." stage but will go no further. I've let the latest attempt run for over an hour and the progress bar for the backup has not progressed further than a 1-pixel sliver. I've seen other folks complain about the update itself stalling out, but I can't even get to that point. I tried deleting the update file under Users/.../Library/iTunes/Updates and restarting iTunes, but then it just redownloaded the update again and stalled out in the exact same spot. Any help you can offer would be very much appreciated.