working table:
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="10" height="20"><img src="siteassist_images/sn_footer_left.jpg" alt="" width="10" height="20" /></td>
<td height="20" align="center" class="footerTable"><div id="footer">
<div class="siteFooterLinks"> </div>
</div></td>
<td width="12" height="20"><img src="siteassist_images/footer_right.jpg" alt="" width="12" height="20" /></td>
</tr>
</table>
'
none working table:
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="10" height="20"><img src="siteassist_images/sn_footer_left.jpg" alt="" width="10" height="20" /></td>
<!-- InstanceBeginEditable name="SiteFooter" -->
<td height="20" align="center" class="footerTable"> <div class="siteFooterLinks"></div> </td>
<!-- InstanceEndEditable -->
<td width="12" height="20"><img src="siteassist_images/footer_right.jpg" alt="" width="12" height="20" /></td>
</tr>
</table>
the middle td cell for the working table includes a footer div and an non breaking space, these are missing from the pages that aren't working.
<td height="20" align="center" class="footerTable"><div id="footer">
<div class="siteFooterLinks"> </div>
The table based layouts where included with Site Assist 2 which was replaced by Site Assist 3 before IE8 came out.