There are a few bugs with zpBootstrap registration page.
1. the checkbox sais "Afficher le mot de passe" even though I have English language.
2. I translated it to find out what it means. But it does not do what it sais. Password you type are hidden no matter state.
3. It is impossible to register. I always end up with "Registration failed. Your passwords did not match.". Switching to standard theme, it works fine.
There is also a bug with login:
1. If trying to log in with wrong user/pass, I am sent back to home page, not to login page.