xsl:comment problem

Hi all,

Seems like document fragments enclosed by xsl:comment directives are  
not being output correctly (as commented output fragments) but  
instead as CDATA

e.g.

<style type="text/css">
   <xsl:comment>
     @import url("<xsl:value-of select="$aVariable"/>/foo/bar.css");
   </xsl:comment>
</style>


does output:

  <style type="text/css">
   <!--
     @import url("/foo/bar.css");
   -->
  </style>


or..

<xsl:comment>
   <foo>bar</foo>
</xsl:comment>

<!--
bar
-->


Is this I known issue or may I file a bug for this one?

Regards
Thomas