I am using the Docbook stylsheet distribution to convert my Docbook file to Html.  The Docbook stylesheets dont seem to like my valid source file and are messing up my copyright node in the html output.  I need to get the stylesheet distribution to output the copyright properly.
                  
My Docbook file validates against Docbook 5, but the copyright year is output like this
               <span class="copyright">
                  <span style="color: red">&lt;year&gt;1996&lt;/year&gt;</span>
               </span>
in the web page that of course looks like the following with a red font
      <year>1996</year>
                  
the Docbook source for this is
            <bibliomixed xml:id="r2">
               <authorgroup>
                  <author> nodes ...
                  </author>
               </authorgroup>
               <copyright>
                  <year>1996</year>
               </copyright>
                        
I am using no customizations related to <copyright>.  I am using the latest version of the Docbook stylesheets distribution.

Please advise.  Thanks.