Bug in Xalan using copy-of on a namespaced attribute?

Cheers,
Geert
-----
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:x="x" version="1.0">

  <xsl:template match="@*|node()">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:template>

  <xsl:template match="xsl:template">
    <xsl:variable name="test">
      <x:test x:attr="test"/>
    </xsl:variable>
    <xsl:variable name="test2">
      <x:test2 attr="test2"/>
    </xsl:variable>

    <xsl:copy>
      <xsl:apply-templates select="@*"/>
      <xsl:copy-of select="$test" />
      <xsl:copy-of select="$test2" />
      <xsl:apply-templates select="node()"/>
    </xsl:copy>
  </xsl:template>