How can I get rid of this?

In your forum_home template under
<!-- main -->
<table cellpadding="{tableouterborderwidth}" cellspacing="0" border="0" bgcolor="{tablebordercolor}" {tableouterextra} width="{contenttablewidth}" align="center"><tr><td>
<table cellpadding="4" cellspacing="{tableinnerborderwidth}" border="0" {tableinnerextra} width="100%">

This code was located
<tr align="center">
<td bgcolor="{tableheadbgcolor}"><smallfont>&nbsp;</smallfont></td>
<td bgcolor="{tableheadbgcolor}" width="80%" align="left"><smallfont color="{tableheadtextcolor}"><b>Forum</b></smallfont></td>
<td bgcolor="{tableheadbgcolor}"><smallfont color="{tableheadtextcolor}"><b>Posts</b></smallfont></td>
<td bgcolor="{tableheadbgcolor}"><smallfont color="{tableheadtextcolor}"><b>Threads</b></smallfont></td>
<td bgcolor="{tableheadbgcolor}" nowrap><smallfont color="{tableheadtextcolor}"><b>Last Post</b></smallfont></td>
<td bgcolor="{tableheadbgcolor}" width="20%"><smallfont color="{tableheadtextcolor}"><b>Moderator</b></smallfont></td>
</tr>

Make sure you delete this line
<tr align="center">

that should help ya!..