Replace:
        <td width="20" align="center"></td>
        <td><span class="gensmall">New posts</span></td>

With:
        <td width="20" align="center"><img src="./styles/EBCentral/imageset/forum_unread.png" alt="Unread posts" title="Unread posts"></td>
        <td><span class="gensmall">New posts</span></td>