Rendering Quality on Windows IE

[Ray Miller <ray.miller@nist.gov>]

Current development environment:
  docbook-dtd-4.4b2
  docbook-xsl-1.67.2
  xalan 2.5
  jre-1.5
  oXygen 5

The following table code fragment:

        <informaltable width="1000" frame="none" cellpadding="0" 
cellspacing="0" dir="ltr" lang="en-US">
             <tgroup cols="2">
               <colspec colwidth="650" align="left"/>
               <colspec colwidth="350" align="right"/>
               <tbody>
                  <row valign="top">
                     <entry>
                        <para>
                           <superscript>Superscript</superscript>
                        </para>
                     </entry>
                     <entry>
                        <para>
                           <superscript>Superscript</superscript>
                        </para>
                     </entry>
                  </row>
               </tbody>
            </tgroup>
            <tgroup cols="5">
               <colspec colwidth="50"/>
               <colspec colwidth="500"/>
               <colspec colwidth="200"/>
               <colspec colwidth="200"/>
               <colspec colwidth="50"/>
               <tbody>
                  <row valign="bottom">
                     <entry/>
                     <entry>
                        <simpara>Some</simpara>
                     </entry>
                     <entry>
                        <simpara>Text </simpara>
                     </entry>
                     <entry>
                        <simpara>Here</simpara>
                     </entry>
                     <entry/>
                  </row>
               </tbody>
            </tgroup>
            <tgroup cols="5">
               <colspec colwidth="50"/>
               <colspec colwidth="500"/>
               <colspec colwidth="200"/>
               <colspec colwidth="200"/>
               <colspec colwidth="50"/>
               <tbody>
                  <row valign="top">
                     <entry/>
                     <entry>
                        <simpara>
                           <superscript>More</superscript>
                        </simpara>
                     </entry>
                     <entry>
                        <simpara>
                           <superscript>Superscript</superscript>
                        </simpara>
                     </entry>
                     <entry>
                        <simpara>
                           <superscript>Text</superscript>
                        </simpara>
                     </entry>
                     <entry/>
                  </row>
               </tbody>
            </tgroup>
         </informaltable>

When transformed to html, renders beautifully on Firefox and Konqueror. 
Superscript font is small and distinctive. However,  when rendered on an 
Win2K box with IE6, all the fonts are UGLY and the superscript fonts are full 
size. 

The web server is Apache on Linux.

Advice please.

Ray