First of all and I say this again... GREAT JOB!!!
I love the design and your website is great too!
Now to the constructive criticism:
I made my first paper wallet using your web site. There are no concerns there, it worked flawlessly, I used Safari and I used an ink-jet printer and the design is a work of art but I printed the wallet in photo/presentation paper which it's not a problem since I figured the paper is sturdy, makes the design look better and I believe it's more durable. That being said, the paper is not designed to be folded!!! to my surprise, the paper slightly broke when I folded (see photo here
https://dl.dropboxusercontent.com/u/72382452/Photo%20Apr%2023%2C%2012%2038%2031%20PM.jpg)
So my concern is the private key in the inside of the fold. Could you find a gracious way to split the private key so the folding area does not tamper with the characters? I'm concerned about the folding messing with the characters and making them unreadable.
I'm sure this issue is not only associated to photo paper but any kind of paper since the fibers are broken when you fold a piece of paper.
I know the QR code is fine, but I'd feel better having redundancy (QR & actual private key)
Anyways, my 2cts for your design.
Great work again!
I believe this is why the textual private keys aren't lined up so any damage will damage different parts of the key. See
( grr, had the wrong link here before I decided to remove the half letters to simulate more damage ) -- [ printed wallet, cut the flap in half, and removed any half letters ( simulating a pretty huge space of damaged textual key -- and honestly, I really doubt damages from a fold will damage exactly one letter ) ] --