As seen on NeoGAF (and multiple other sites):
http://www.neogaf.com/forum/showthread.php?t=644999
Version 6.2.0-12U available via wireless Internet connection includes the following improvements:
Added support for the StreetPass relay feature:
-The Streetpass relay feature relays StreetPass data from one user that passes a Nintendo Zone to the next user that passes the same Nintendo Zone
-For more information on this feature, click here.
Improved system stability and usability:
-Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.
http://www.neogaf.com/forum/showthread.php?t=644999
Version 6.2.0-12U available via wireless Internet connection includes the following improvements:
Added support for the StreetPass relay feature:
-The Streetpass relay feature relays StreetPass data from one user that passes a Nintendo Zone to the next user that passes the same Nintendo Zone
-For more information on this feature, click here.
Improved system stability and usability:
-Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.