Apple today has told it’s developers that starting September 22nd they will be be erasing developers iCloud backups meaning anything prior to September 22nd will be gone and during the erasing process you will not be able to back up or restore from iCloud or you will get an error.
On Thursday, September 22, the iCloud Backup data will be reset. Backing up to iCloud or restoring from an iCloud backup will be unavailable from 9 AM PDT – 5 PM PDT. If you attempt a backup or restore during this time, you will receive an alert that the backup or restore was not successful. After this reset, you will be unable to restore from any backup created priorto September 22. A full backup will happen automatically the next time your device backs up to iCloud.
So this most likely means the next iOS 5 update for developers will be the GM and the public release will be coming soon.
uApps 