[Keith]

From that user.php file, here's the code, but this doesn't appear to be a problem:

if ($exists=$DB_site->query_first("SELECT userid
					FROM user
					WHERE username='".addslashes(htmlspecialchars($ausername))."'
						AND userid <> $userid")) {
		echo "There is already an ".makelinkcode('user',"user.php?do=edit&userid=$exists[userid]",1)." named <b>".htmlspecialchars($ausername)."</b>";
		exit;
	}

I replaced the member.php with my original, and deleted the field in the template, but still get the same error now. Any ideas?