Site in question:
*Site no longer in operation
This seems to be only apparent when a user is not logged into the site, but when a visitor clicks "Buy Now", the page correctly shows the guest checkout fields. However, when typing in an email address for the guest checkout "Continue" button, the button does nothing. It doesn't return an error, go to a different page, or anything. When you click "Create An Account", it correctly serves up the registration forms (i.e. user name, password, etc), but upon clicking "Register", it does the same thing. There is a little more feedback, as Firefox asks to remember password, but other than that, it's basically just clearing the form's fields and not registering a new user (WP Dashboard > Users confirmed).
Like I mentioned, these "dead" actions do not happen when I'm logged into the site. The actions are the same whether the form is on the page or in the Exchange Super Widget.
I'm using the Recurring Charges, User Defined Price, Stripe, and a few core add-ons. 5 products only.
I don't think it's a plugin issue, and I've deactivated, deleted, and reinstalled all of the iThemes Exchange plugins hoping to find a solution. I can send over login info if needed.