icloud will reset on September 22

Apple has released developer center the following note:

On Thursday, September 22, the icloud Backup Data Will Be reset. Backing up or Restoring from icloud to an icloud backup will be unavailable from 9 AM PST - 5 PM PDT. If you Attempt to restore or backup DURING This Time, You Will Receive an alert backup or restore That the not was successful. Reset After This, You Will Be Unable to restore from backup created prior to Any September 22. A full backup Will Happen Automatically the next time your device backs up to icloud.

So on Thursday, September 22 icloud all data will be reset, it is only natural that the launch of the GM version comes just the day or the day after, because the GM version can be considered as a final version, but only for developers.

So if you installed a beta recommend you sync with your iTunes on your computer and back to back in icloud after September 22 and already on their way to install the GM version.