Important change in 1.3.. This is for those who have the same problems as prawn had:
Open your template 'register'.
find:
HTML Code:
<fieldset class="fieldset">
<legend>$vbphrase[password]
and
ADD ABOVE:
HTML Code:
<if condition="$show[usernamecheck]">
<span class="registererrorhidden" id="nameCheckFailed">$vbphrase[registererror]
<span class="registerokhidden" id="nameCheckOk">$vbphrase[registerok]
</if>