I tried to setup an account with Mozilla Persona today. I have two email accounts (one with Gmail, the other with Outlook.com). I entered an email address, a password, entered the password again. I got a link in my email asking to confirm my account, but when I clicked on the link in my email, I got redirected to a page on the Mozilla Persona page saying there was a problem with my login signup link, and apparently asking if my email had been registered before. I tried this several times over, cleared my cache, enabled and disabled cookies, but nothing. I even logged into my old AIM account to see if it might work there. Nothing. The same message in Chrome, Firefox and Safari.