Good Question, I don't know that much about css.
Here is the category.html source... Maybe you can spot something that I have overlooked.
Thanks,
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="GENERATOR" content="Mozilla/4.7 [en]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) [Netscape]">
<title><%site_title%></title>
</head>
<body text="#000000" bgcolor="#666666" link="#000000" vlink="#000000" alink="#FFFFFF" TOPMARGIN="0" BOTTOMMARGIN="0" LEFTMARGIN="0" RIGHTMARGIN="0" MARGINWIDTH="0" MARGINHEIGHT="0">
<center><table BORDER=0 CELLSPACING=0 CELLPADDING=2 COLS=1 WIDTH="754" BGCOLOR="#333333" >
<tr>
<td BGCOLOR="#333333">
<table BORDER=0 CELLSPACING=0 CELLPADDING=0 COLS=1 WIDTH="100%" >
<tr>
<td BGCOLOR="#7B040D">
<table BORDER=0 CELLSPACING=5 CELLPADDING=0 COLS=1 WIDTH="100%" >
<tr>
<td BGCOLOR="#CB0716"><b><font face="Verdana"><font color="#FFFFFF"><font size=+1><%site_title%>:
<%category_clean%></font></font></font></b></td>
</tr>
</table>
</td>
</tr>
</table>
<table BORDER=0 CELLSPACING=0 CELLPADDING=0 COLS=3 WIDTH="100%" >
<tr VALIGN=TOP>
<td VALIGN=TOP WIDTH="5" BGCOLOR="#7B040D"> </td>
<td WIDTH="595" BGCOLOR="#FFFFFF">
<font face="Verdana"><font size=-1><%if meta_name%> <%endif%><%if meta_keywords%><%endif%> </font></font><link rel=stylesheet href="<%build_root_url%>/links.css" type="text/css" title="<%site_title%> style sheet">
<font face="Verdana"><font size=-1><%if related%> </font></font>
<b><font face="Verdana"><font color="#000000"><font size=-1>Related
Categories:</font></font></font></b>
<ul><font face="Verdana"><font size=-1><%related%></font></font></ul>
<font face="Verdana"><font size=-1><%endif%> </font></font></td>
<td VALIGN=TOP WIDTH="150" BGCOLOR="#7B040D">
<center><table BORDER=0 CELLSPACING=0 CELLPADDING=0 COLS=1 WIDTH="95%" >
<tr>
<td VALIGN=TOP BGCOLOR="#333333">
<table BORDER=0 CELLPADDING=0 COLS=1 WIDTH="100%" >
<tr>
<td BGCOLOR="#CB0716">
<center><b><font face="Verdana"><font color="#FFFFFF"><font size=-1>Site
Menu</font></font></font></b></center>
</td>
</tr>
<tr>
<td BGCOLOR="#FFFFCC"><b><font face="Verdana"><font size=-1><a href="<%build_root_url%>">Home</a></font></font></b></td>
</tr>
<tr>
<td BGCOLOR="#FFFF99"><b><font face="Verdana"><font size=-1><a href="<%db_cgi_url%>/add.cgi">Add</a></font></font></b></td>
</tr>
<tr>
<td BGCOLOR="#FFFF00"><b><font face="Verdana"><font size=-1><a href="<%db_cgi_url%>/modify.cgi">Modify</a></font></font></b></td>
</tr>
<tr>
<td BGCOLOR="#FFCC00"><b><font face="Verdana"><font size=-1><a href="<%build_root_url%>/New">New</a></font></font></b></td>
</tr>
<tr>
<td BGCOLOR="#FCAD36"><b><font face="Verdana"><font size=-1><a href="<%build_root_url%>/Cool">Cool</a></font></font></b></td>
</tr>
<tr>
<td BGCOLOR="#F98239"><b><font face="Verdana"><font size=-1><a href="<%build_root_url%>/Ratings">Top
Rated</a></font></font></b></td>
</tr>
<tr>
<td BGCOLOR="#FE5334"><b><font face="Verdana"><font size=-1><a href="<%db_cgi_url%>/search.cgi">Search</a></font></font></b></td>
</tr>
<tr>
<td BGCOLOR="#FA3D05">
<center><form action="<%db_cgi_url%>/search.cgi" method="GET"><input type="text" size=15 name="query"><input type=submit value="Search!"></center>
</td>
</tr>
<tr>
<td></form></td>
</tr>
</table>
</td>
</tr>
</table></center>
</td>
</tr>
</table>
<table BORDER=0 CELLSPACING=0 CELLPADDING=0 COLS=1 WIDTH="100%" >
<tr>
<td WIDTH="70" BGCOLOR="#7B040D">
<div align=right><b><font face="Verdana"><font color="#FFFFFF"><font size=-2><a href="#top">Top</a></font></font></font></b></div>
</td>
</tr>
</table>
</td>
</tr>
</table></center>
<center>
<p><font face="Verdana"><font color="#FFFFFF"><font size=-2>Links Engine
2.0 By: <a href="http://www.gossamer-threads.com">
Gossamer Threads Inc.</a></font></font></font>
<font face="Verdana"><font color="#FFFFFF"><font size=-2>Using Templates
by
<a href="http://cgi-resource.co.uk">GB Resources</a></font></font></font></center>
<p>
</body>
</html>