sigue sin cambiarse... estoy como antes
para empezar me faltan tus css.
en segunda no se si modificaste cada estilo.
en tercera te dejo el codigop como creo que podria solucionarce.

Código PHP:
{$ignore_bit}
 <
a name="pid{$post['pid']}id="pid{$post['pid']}"></a>
 <
table border="0" cellspacing="0" cellpadding="0" width="100%" style="{$post_extra_style} {$post_visibility}id="post_{$post['pid']}">
     <
tr>
         <
td>
             <
div class="caja-usuario">
                 <
div class="caja-usuario-cabecera"></div>
                 <
div class="caja-usuario-contenido">
                     <
div class="caja-usuario-datos" align="center" style="float:left;">
                         <
strong><span class="largetext"><a href="{$post['profilelink_plain']}id="miembro_{$post['pid']}">{$post['username_formatted']}<img src="{$theme['imgdir']}/arrow_down.gif" alt="v" style="vertical-align: middle;" /></a></span></strong><br />
                         <
div id="miembro_{$post['pid']}_popup" class="popup_menu smalltext" style="display: none;">
                             <
div class="popup_item_container"><a href="{$post['profilelink_plain']}class="popup_item">{$post['username_formatted']}</a></div>
                             {
$post['button_email']}
                             {
$post['button_pm']}
                             {
$post['button_find']}
                             {
$post['button_www']}
                         </
div>
                         <
script type="text/javascript">if(use_xmlhttprequest == "1"){new PopupMenu("miembro_{$post['pid']}");}</script>
                         <
span class="smalltext">
                             {
$post['usertitle']}<br />
                             {
$post['userstars']}
                             {
$post['groupimage']}
                             {
$post['useravatar']}<br />
                             {
$post['onlinestatus']}
                             <
div align="left">{$post['user_details']}</div>
                         </
span>
                     </
div>
                 </
div>
                 <
div class="caja-usuario-pie"></div>
             </
div>
             <
div class="caja-mensaje">
                 <
div class="caja-mensaje-cabecera">
                     {
$post['posturl']}<span class="smalltext"><strong>{$post['postdate']} {$post['posttime']}</strong>{$post['subject_extra']}</span><span style="text-align: right; vertical-align: bottom;" id="post_meta_{$post['pid']}">{$post['iplogged']}</span>
                     <
div id="edited_by_{$post['pid']}">{$post['editedmsg']}</div>
                 </
div>
                 <
div class="caja-mensaje-contenido">
                     <
img src="{$theme['imgdir']}/flecha.png" class="flecha" />
                     <
div style="width: 100%">
                         <
div id="pid_{$post['pid']}style="padding: 5px 0 5px 0; float:rigth;">
                             {
$post['message']}
                         </
div>
                         {
$post['attachments']}
                         {
$post['signature']}
                     </
div>
                 </
div>
                 <
div class="caja-mensaje-pie">
                     <
div class="float_right smalltext">{$post['button_edit']}{$post['button_quickdelete']}{$post['button_quote']}{$post['button_multiquote']}{$post['button_report']}{$post['button_warn']}{$post['button_reply_pm']}{$post['button_replyall_pm']}{$post['button_forward_pm']}{$post['button_delete_pm']}</div>
                     <
div class="smalltext">{$post['button_rep']}</div>
                 </
div>
             </
div>
         </
td>
     </
tr>
 </
table