[calorie]

Would need to do a file edit:

	/**
	* Verifies that the provided username is valid, and attempts to correct it if it is not valid
	*
	* @param	string	Username
	*
	* @return	boolean	Returns true if the username is valid, or has been corrected to be valid
	*/
	function verify_username(&$username)
	{
		// fix extra whitespace and invisible ascii stuff
		$username = trim(preg_replace('#[ \r\n\t]+#si', ' ', strip_blank_ascii($username, ' ')));