Just FYI, I was attempting to register my account and I am unable to because my username for the game is longer than the typical. Can you fix the validation on the merge account page to account for those that are longer?
It probably wouldn't be so bad, however you can't modify the username in the form when it happens. So you are basically stuck.
I'll increase the maximum length in an update I'll be pushing out later tonight. Sorry for the inconvenience.