Mozilla XSLT uppercases all my tags !

Hi,

I am trying to pretty print some SOAP messages I get from Mozilla via 
xmlhttprequest.
Everything is fine except that my (non qualified) tags are all put to 
upper case.

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Body>
   <MYGUP>	
    <MYSELF>
     <ADDRESS>
      <HOMEADDRESS>
...

My mark-up is MyGup, MySelf, Address, HomeAdress, etc.
Is there a way to have Mozilla leave non qualified tags unchanged?

regards,

Arnaud

PS: here is the stylesheet that I use for pretty printing. Nothing fancy 
as you can see.

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:output method="xml" omit-xml-declaration="yes"/>
   <xsl:param name="indent-increment" select="\' \'" />
   <xsl:template match="*">
     <xsl:param name="indent" select="\'&#xA;\'"/>
     <xsl:value-of select="$indent"/>
     <xsl:copy>
       <xsl:copy-of select="@*"/>
       <xsl:apply-templates>
	<xsl:with-param name="indent"
                         select="concat($indent,$indent-increment)"/>
       </xsl:apply-templates>
       <xsl:if test="*">
	<xsl:value-of select="$indent"/>
       </xsl:if>
     </xsl:copy>
   </xsl:template>
   <xsl:template match="comment()|processing-instruction()">
     <xsl:copy/>
   </xsl:template>
   <xsl:template match="text()[normalize-space(.)=\'\']"/>
</xsl:stylesheet>