> Having recently upgraded to Acrobat 8 (from 5), I now find that I can't
> print a book file to a single pdf.
When you installed Acrobat 8, did you first uninstall v.5 (and any version
of Adobe Reader or the distiller that came with FrameMaker)? Since version
6, Dov Isaacs of Adobe has warned us not have more than one installation of
Adobe Acrobat and/or Adobe Reader and/or the PDF Distiller that comes with
FrameMaker on any given computer. They can conflict. If you had other
versions of Acrobat, Reader, or Distiller installed, you should uninstall
all of them and then reinstall Acrobat 8.