When you enter the captcha validation field and press ENTER (to submit the form) you actually submit the "refresh captcha image" form - this makes you go round and round without any logical explanation (I thought maybe my email was already registered so I tried logging in etc.). Turns out you have to mouseclick the submit button.

I know it's not a princeXML bug per-se but I thought you should know (not like the admins need to register again!) - It's a minor issue but might be stopping people from contributing to the forums etc.

I have since forgotten why I registered...