Hello Denis,
I suggest that you ask this sort of question on the fop-user mailing list.
Please join it.
I have copied it to them to see if anyone can help.
What diagnosis have you tried? What version of fop are you using? Does it
work with any other renderer - eg to PDF?
What operating system?
Here's some interesting historical background from a typographer type (no
pun intended) who clearly gets all worked up over the issue:
http://www.ms-studio.com/articles.html
Bob DuCharmewww.snee.com/bob bob@
snee.com see http://www.snee.com/bob/xsltquickly for
info on book