Possible that the trigger for the Bricking code has been in the Gateway launcher as to why Official bricks are occurring
and relates to any file on the SD card being dated 4th Feb 2014 or later
so if someone either has a file with that date on there SD card or Puts Forward there Internal clock (for play coin cheating) thus when the 3DS next saves to the SD it creates a file with the date 4th Feb or Later then a Brick could occur
possible Kill Code found
Code:
0x10410,0x10) MMC_SET_BLOCKLEN
0x50c1b,0) //PROGRAM_CSD
0x50c2a,0x0) setpass
0x10410,0x200) MMC_SET_BLOCKLEN