Patch for iPhone/iPad backup in iTunes

To get the patch go to this iTunes https://www.apple.com/itunes/download/ page, install as normal and wait for an iPhone Icon alerting you to the patch. The original installer and the patch download and install work concurrently, so be patient.
All is now well here, and with luck Apple will soon issue an updated installer.
Source:
https://discussions.apple.com/message/33893455#33893455