Is anybody else having this problem? I restored my iPad to the 4.2 GM firmware and then restored the backup in iTunes, in order to keep all my settings etc. The backup restored ok but when the iPad reboots the progress bar comes up and stops about 4/5's of the way through and iTunes freezes. I left it for over an hour and it never budged. I have just restored to the 4.2 Beta 3 and the backup restores just fine.