The 6.3.0-12 system update was released on September 13, 2013.
Changelog
Official changelog:
N/A at the time of writing.
Updated titles
The following titles were updated: CVer and NS CFA. The following new title was added, see the title_list: 0004001B00010802. The SD_Savedata_Backups blacklist stored in the NS CFA title was updated to add a new uniqueID to the blacklist.