Apple has issued a maintenance update to the Mac OS X Lion 10.7.3 system update that was released to the public recently.
The Mac OS X Lion 10.7.3 Supplemental Update is available through Software Update under the Apple menu. You can also find it as a standalone download here. Its size is 24.55MB.
This update fixes an issue when restoring a Mac from a Time Machine backup. Apple said that the update is recommended for users running 10.7.3 with Time Machine backups.
Source: 9TO5 Mac