I am having this same problem. I never upgraded my wife's iPhone (2.2.1) to the Beta, and it upgraded PERFECTLY. Everytime I try to upgrade MY iPhone (3.0Beta5) it keeps on giving me all sorts of errors, telling me that the resource was not there or something.
I DOWNLOADED THE OFFICIAL RELEASE FOR HER PHONE! Why cant it find it when I click restore?!?!?!?
Anyone care to help me?
I would even be happy if I knew where iTunes downloaded the file to, so I could unpack it and manually direct iTunes to install from that restore, ANY HELP would be appreciated.