I installed the latest stylesheets 1.52.1 and then tried to render PDF 
from the
formatting objects output, created with xsltproc, with pdfxmltex.  
Everything worked
fine with version 1.51.1, with this new version I get this strange error:
 
xmltex version: 2000/09/07 v1.8y (Exp):
(c:/docbook/TeXLive/texmf/tex/xmltex/base/xmltex.cfg)
No File: test.cfg (c:/docbook/TeXLive/texmf/tex/xmltex/passivetex/fotex.xmt
! Illegal parameter number in definition of \x@temp.
(to be read again)
 
1.2 ...ustify" line-height="normal" language="en">
                                                                       
<fo: layout-master-set><fo:...
 
It seemed to be complaining about the line:
 
font-family="&quot;Times Roman&quot;,serif"
 
which using the old version was:
 
font-family="Times Roman"
 
so I changed this to:
 
"Times Roman,serif"
 
and tried again, generating the error:
 
! Illegal parameter number in definition of \x@temp.
<to be read again>
 
1.2 ...ont-family="&quot;Times Roman&quot;,serif">
                                                                           
&#xA9;</fo:inline> 1998 Yo...
 
so I found what I thought was the offending line:
 
font-family="&quot;Times Roman&quot;,serif">
 
and changed it to
 
"Times Roman,serif"
 
then tried again, generating the error(s):
 
LaTeX Warning: Reference 'id360373' on page 1 undefined on input line 2.
 
LaTeX Warning: Reference 'id360388' on page 1 undefined on input line 2.
 
! Missing \endgroup inserted.
<inserted text>
                        \endgroup
1.6      </fo:block></fo:block></fo:flow>
                                                         </fo:page-
sequence></fo:root>