You have to enter a valid and live e-mail address, because the letter to activate your account will be sent to this address. It is allowed to be maximum 50 characters long.

The username must be at least 4, but maximum 20 characters long and it may contain letters (without accents), dot, dash, exclamation mark and underscore.
It will be displayed when you are an author and will be used to log in to the homepage.

This password will be needed to log in.
It must be at least 4, but maximum 20 characters long, and may contain letters (withouth accents), digits, dot (.), dash (-), and underscore (_). The password is case-sensitive!

Re-type your password to avoid problems due to typos.