possible Bug for book pagenumbering for xsl stylesheets 1.75.2 and1.76.0

Hi,

I am producing pdf book with xsltproc and xep. While viewing a pdf i 
noticed acrobat Reader showing the numbers 1,2,iii,iv,v...,1,2,3 .

I think that there is a case where the function for page numbering is 
missing a case for the very first two pages.


------- altered function from fo/pagesetup.xsl ---------------------
<xsl:template name="page.number.format">
   <xsl:param name="element" select="local-name(.)"/>
   <xsl:param name="master-reference" select="''"/>


   <xsl:choose>
  <!--  ++ return Roman numbering for  titlepages -->
     <xsl:when test="$element = 'book'">i</xsl:when>
  <!--                                         -->
     <xsl:when test="$element = 'toc' and self::book">i</xsl:when>
     <xsl:when test="$element = 'preface'">i</xsl:when>
     <xsl:when test="$element = 'dedication'">i</xsl:when>
     <xsl:when test="$element = 'acknowledgements'">i</xsl:when>
     <xsl:otherwise>1</xsl:otherwise>
   </xsl:choose>
</xsl:template>