My host called and told me, that
comments.tmpl is making this error:
tr>
</table>
</div>
<div class="controlbar">
<textareahtml name="message" id="qr_message" class="bginput" style="width:{$vbphrase[form_width]}; height:100px" cols="60" rows="5" tabindex="1">$ecomments</textareahtml>
</div>
<script type="text/javascript" src="{$Globals['vbulletin']}/clientscript/vbulletin_editor.
js"></script>
<script type="text/javascript" src="{$Globals['vbulletin']}/clientscript/vbulletin_stdedit.
js"></script>
</td>
</tr>
</table>
This files doesnt exist on Vbulletin 3.6.