God.. Don't know if it's a bug, but I backed up my beta 6 install in iTunes before restoring, it said backing up, and I even clicked synchronize/backup two times. In iTunes, the box with "Backup to computer" was checked. But no.. Just installed iOS 7 GM, and latest backup I can choose is from July 30... Also MobileSync folder where the backups are stored is empty. Just a warning for you guys! Be 100000% sure it has backed up.