The confirmation code is pure evil!
It is case sensitive but you cannot understand what case is a "k" when it's ad-hoc distorted!
I tried so many times... at last I was LUCKY!
Look:
Try 1

"k" is upper or lower?
And "X"?
Try 2

What the heck is first letter? An "S"??????
What case are "x" and "z"?
Try 3

What case is "v" at the beginning?
And the two "u"? Are they one lower and one upper??
Try 4

What case is that damn "x"? Is your site configured to put at least one ambiguous char in each confirmation code?

Try 5

This time only "u" is ambiguous... I got 50%....
DOOOONNNEEEEEE AT LAAASSSTTT!!!!
Puff puff... plz change that hell of registration.
