[Jolten]

Your'e missing class attributes on the bottom tables. Examples below are how they should look. You can just add the class="alt1" attribute to the table tags or just copy > paste these table tags where they exist in your template.

<!-- icon key -->
<if condition="$show['threadslist']">
<table cellpadding="2" cellspacing="0" border="0" class="alt1">
<tr>
        <td><img src="$stylevar[imgdir_statusicon]/thread_new.gif" alt="$vbphrase[new_posts]" border="0" /></td>
        <td class="smallfont">$vbphrase[new_posts]</td>

and

 <else />
<table cellpadding="0" cellspacing="2" border="0" width="100%" class="alt1">
<tr valign="bottom">

and

<!-- forum rules & forum jump -->
<table cellpadding="0" cellspacing="0" border="0" width="100%" align="center" class="alt1">
<tr valign="top">

That should fix it.