Looks like it's working now. Thanks!

Edit: Spoke too soon. My wife can't sign up. Button just says "Sending" indefinitely.

Edit 2: She just got an email confirmation code, despite the signup eventually failing outright. But she can't log in, says the username is invalid. So what is the confirmation code associated with?

Edit 3: It finally worked. Yay!

Seems to be responding better but the recovery code process is a little off. Says that the email address I'm trying to use is taken (it's the one I used at registration after the nag message) and that my recovery code is invalid.