My iPhone 6S came today. I dutifully backed up my iPhone 5 to iTunes, as you can see here in the list of backups:
("Mattress" is the name of my iPhone.)
Great. So I set up my iPhone 6S as a new phone, so I could update the software to match what is installed on the 5. And then I went to restore the backup from today, and:
Where's my backup from today? Why can't I restore it to my new phone?
A clue: July 10th, the date of the backup I can see, is the day I installed the iOS 9 beta on the old phone. Registering the 6S for the beta program hasn't solved it, and neither has deregistering the 5 and creating a new backup.