I think he patched it in his newest post. It was only realesed today i think (today of posting)Hi : )
Today or yesterday smealum updated the payload for the screen shot problem.
https://smealum.github.io/ninjhax2/
but when read the QR code got an error and go back to home menu.
My "New 3DS" is 10.3.0-28(J). Does anyone has same problem here?
(source)
https://twitter.com/smealum/status/667140858718785536
