iTunes 11.1 is out, bringing iTunes Radio to your desktop. To restore backed up data onto a a phone running the beta version of iOS 7, you needed the beta version of iTunes 11.1. It's possible this will be the case for the live versions as well, so if updating is in your afternoon plans, you might as well hop to it. (DMG download)
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I thought you could update OTA (not that I care, I've had the GM for a week).