me parece que eso es problema de tu plantilla Showthread ponla aqui para que la analicemos
Código PHP:
<html>
<
head>
<
title>{$thread['subject']}</title>
{
$headerinclude}
<
script type="text/javascript">
<!--
    var 
quickdelete_confirm "{$lang->quickdelete_confirm}";
// -->
</script>
<
script type="text/javascript" src="jscripts/thread.js?ver=1400"></script>
<
script type="text/javascript" src="jscripts/fitonpage.js?ver=230"></script>
<
script type="text/javascript">
<!--
    var 
fitonpage_on "{$mybb->settings['g33k_fitonpage_enabled']}";
    var 
fitonpage_resize "{$mybb->settings['g33k_fitonpage_resize']}";
    var 
fitonpage_fluid "{$mybb->settings['g33k_fitonpage_fluid']}";
    var 
fitonpage_topbar_resized "{$lang->fitonpage_topbar_resized}";
    var 
fitonpage_topbar_full "{$lang->fitonpage_topbar_full}";
    var 
fitonpage_topbar_text_class "{$mybb->settings['g33k_fitonpage_topbar_text_class']}";
    var 
fitonpage_topbar_bground "{$mybb->settings['g33k_fitonpage_topbar_bground']}";
    var 
fitonpage_topbar_icon "{$mybb->settings['g33k_fitonpage_topbar_icon']}";
    var 
fitonpage_location "showthread";
-->
</
script>
<
script type="text/javascript" src="jscripts/fitonpage.js?ver=230"></script>
<
script type="text/javascript">
<!--
    var 
fitonpage_on "{$mybb->settings['g33k_fitonpage_enabled']}";
    var 
fitonpage_resize "{$mybb->settings['g33k_fitonpage_resize']}";
    var 
fitonpage_fluid "{$mybb->settings['g33k_fitonpage_fluid']}";
    var 
fitonpage_topbar_resized "{$lang->fitonpage_topbar_resized}";
    var 
fitonpage_topbar_full "{$lang->fitonpage_topbar_full}";
    var 
fitonpage_topbar_text_class "{$mybb->settings['g33k_fitonpage_topbar_text_class']}";
    var 
fitonpage_topbar_bground "{$mybb->settings['g33k_fitonpage_topbar_bground']}";
    var 
fitonpage_topbar_icon "{$mybb->settings['g33k_fitonpage_topbar_icon']}";
    var 
fitonpage_location "showthread";
-->
</
script>
</
head>
<
body>
    {
$header}
    {
$pollbox}
    <
div class="float_left">
        {
$multipage}{$tags}
    </
div>
    <
div class="float_right">
        {
$newreply}
    </
div>
    {
$ratethread}
    <
table border="0" cellspacing="{$theme['borderwidth']}cellpadding="{$theme['tablespace']}class="tborder" style="clear: both; border-bottom-width: 0;">
        <
tr>
            <
td class="thead" colspan="2">
                <
div style="float: right;">
                    <
span class="smalltext"><strong><a href="showthread.php?mode=threaded&amp;tid={$tid}&amp;pid={$pid}#pid{$pid}">{$lang->threaded}</a> | <a href="showthread.php?mode=linear&amp;tid={$tid}&amp;pid={$pid}#pid{$pid}">{$lang->linear}</a></strong></span>
                </
div>
                <
div>
                    <
strong>{$thread['subject']}</strong>
                </
div>
            </
td>
        </
tr>
        {
$classic_header}
    </
table>

    <
div id="posts">
        {
$posts}
    </
div>
    <
table border="0" cellspacing="{$theme['borderwidth']}cellpadding="{$theme['tablespace']}class="tborder" style="border-top-width: 0;">
        <
tr>
            <
td colspan="2" class="tfoot">
                {
$search_thread}
                <
div>
                    <
strong>&laquo; <a href="{$next_oldest_link}">{$lang->next_oldest}</a> | <a href="{$next_newest_link}">{$lang->next_newest}</a> &raquo;</strong>
                </
div>
            </
td>
        </
tr>
    </
table>
    <
div class="float_left">
        {
$multipage}{$tags}
    </
div>
    <
div style="padding-top: 4px;" class="float_right">
        {
$newreply}
    </
div>
    <
br style="clear: both;" />
    {
$quickreply}
    {
$threadexbox}
    {
$similarthreads}
    <
br />
    <
div class="float_left">
        <
ul class="thread_tools">
            <
li class="printable"><a href="printthread.php?tid={$tid}">{$lang->view_printable}</a></li>
            <
li class="sendthread"><a href="sendthread.php?tid={$tid}">{$lang->send_thread}</a></li>
            <
li class="subscription_{$add_remove_subscription}"><a href="usercp2.php?action={$add_remove_subscription}subscription&amp;tid={$tid}&amp;my_post_key={$mybb->post_code}">{$add_remove_subscription_text}</a></li>
        </
ul>
    </
div>

    <
div class="float_right" style="text-align: right;">
        {
$moderationoptions}
        {
$forumjump}
    {
$footer}
</
body>
</
html
Pruebalo asi

Código PHP:
<html>
<
head>
<
title>{$thread['subject']}</title>
{
$headerinclude}
<
script type="text/javascript">
<!--
    var 
quickdelete_confirm "{$lang->quickdelete_confirm}";
// -->
</script>
<
script type="text/javascript" src="jscripts/thread.js?ver=1400"></script>
<
script type="text/javascript" src="jscripts/fitonpage.js?ver=230"></script>
<
script type="text/javascript">
<!--
    var 
fitonpage_on "{$mybb->settings['g33k_fitonpage_enabled']}";
    var 
fitonpage_resize "{$mybb->settings['g33k_fitonpage_resize']}";
    var 
fitonpage_fluid "{$mybb->settings['g33k_fitonpage_fluid']}";
    var 
fitonpage_topbar_resized "{$lang->fitonpage_topbar_resized}";
    var 
fitonpage_topbar_full "{$lang->fitonpage_topbar_full}";
    var 
fitonpage_topbar_text_class "{$mybb->settings['g33k_fitonpage_topbar_text_class']}";
    var 
fitonpage_topbar_bground "{$mybb->settings['g33k_fitonpage_topbar_bground']}";
    var 
fitonpage_topbar_icon "{$mybb->settings['g33k_fitonpage_topbar_icon']}";
    var 
fitonpage_location "showthread";
-->
</
script>
<
script type="text/javascript" src="jscripts/fitonpage.js?ver=230"></script>
<
script type="text/javascript">
<!--
    var 
fitonpage_on "{$mybb->settings['g33k_fitonpage_enabled']}";
    var 
fitonpage_resize "{$mybb->settings['g33k_fitonpage_resize']}";
    var 
fitonpage_fluid "{$mybb->settings['g33k_fitonpage_fluid']}";
    var 
fitonpage_topbar_resized "{$lang->fitonpage_topbar_resized}";
    var 
fitonpage_topbar_full "{$lang->fitonpage_topbar_full}";
    var 
fitonpage_topbar_text_class "{$mybb->settings['g33k_fitonpage_topbar_text_class']}";
    var 
fitonpage_topbar_bground "{$mybb->settings['g33k_fitonpage_topbar_bground']}";
    var 
fitonpage_topbar_icon "{$mybb->settings['g33k_fitonpage_topbar_icon']}";
    var 
fitonpage_location "showthread";
-->
</
script>
</
head>
<
body>
    {
$header}
    {
$pollbox}
    <
div class="float_left">
        {
$multipage}{$tags}
    </
div>
    <
div class="float_right">
        {
$newreply}
    </
div>
    {
$ratethread}
    <
table border="0" cellspacing="{$theme['borderwidth']}cellpadding="{$theme['tablespace']}class="tborder" style="clear: both; border-bottom-width: 0;">
        <
tr>
            <
td class="thead" colspan="2">
                <
div style="float: right;">
                    <
span class="smalltext"><strong><a href="showthread.php?mode=threaded&amp;tid={$tid}&amp;pid={$pid}#pid{$pid}">{$lang->threaded}</a> | <a href="showthread.php?mode=linear&amp;tid={$tid}&amp;pid={$pid}#pid{$pid}">{$lang->linear}</a></strong></span>
                </
div>
                <
div>
                    <
strong>{$thread['subject']}</strong>
                </
div>
            </
td>
        </
tr>
        {
$classic_header}
    </
table>

    <
div id="posts">
        {
$posts}
    </
div>
    <
table border="0" cellspacing="{$theme['borderwidth']}cellpadding="{$theme['tablespace']}class="tborder" style="border-top-width: 0;">
        <
tr>
            <
td colspan="2" class="tfoot">
                {
$search_thread}
                <
div>
                    <
strong>&laquo; <a href="{$next_oldest_link}">{$lang->next_oldest}</a> | <a href="{$next_newest_link}">{$lang->next_newest}</a> &raquo;</strong>
                </
div>
            </
td>
        </
tr>
    </
table>
    <
div class="float_left">
        {
$multipage}{$tags}
    </
div>
    <
div style="padding-top: 4px;" class="float_right">
        {
$newreply}
    </
div>
    <
br style="clear: both;" />
    {
$quickreply}
    {
$threadexbox}
    {
$similarthreads}
    <
br />
    <
div class="float_left">
        <
ul class="thread_tools">
            <
li class="printable"><a href="printthread.php?tid={$tid}">{$lang->view_printable}</a></li>
            <
li class="sendthread"><a href="sendthread.php?tid={$tid}">{$lang->send_thread}</a></li>
            <
li class="subscription_{$add_remove_subscription}"><a href="usercp2.php?action={$add_remove_subscription}subscription&amp;tid={$tid}&amp;my_post_key={$mybb->post_code}">{$add_remove_subscription_text}</a></li>
        </
ul>
    </
div>

    <
div class="float_right" style="text-align: right;">
        {
$moderationoptions}
        {
$forumjump}
    </
div>
    <
br style="clear: both;" />
    {
$usersbrowsing}
    {
$footer}
</
body>
</
html
Ya lo soluciones, habia borrado, esto :S
</div>
<br style="clear: both;" />


= Gracias por su ayuda Smile
Si de echo fue lo que te acomode jejejeej