Though Nintendo’s website http://www.nintendo.com/3ds/system-update still shows 7.1.0-16 this time, but in fact 3DS is updating to 7.2.0-17 now.
If you use a 3ds below 4.5 to pay 3ds games with gateway 3ds, please ignore this message and must not do any update action.
From http://en-americas-support.nintendo.com/app/answers/detail/a_id/231/~/summary-of-menu-versions, we know the updated details about 7.2.0-17:
Update released: May 12th, 2014
- Added e-mail support to Parental Controls, allowing parents that have forgotten their PIN to send themselves an e-mail with instructions on unlocking Parental Controls.
- Further improvements to overall system stability and other minor adjustments have been made to enhance the user experience.
And today 3dseu will test many normal 2d flash carts to test if they will work fine in new 3ds 7.1.0-16.