<xsl:when test="substring(forename, string-length(.)) = '.'">
  <xsl:value-of select="surname" />,<xsl:value-of select="forename"
/><xsl:text>&#160;</xsl:text>
    </xsl:when>

should be

<xsl:when test="substring(forename, string-length(forename)) = '.'">
  <xsl:value-of select="surname" />,<xsl:value-of select="forename"
/><xsl:text>&#160;</xsl:text>
    </xsl:when>