When I print from Word to Adobe PDF, characters in the file name like "(" are replaced by "_".
I'd like to stop this, so the pdf file name is the same as the Word file name, but with a pdf extension.
Thanks.

Those changes are attributable to Adobe Acrobat, not Word, and there's nothing you can do about it from the Word end. That said, you could use Word's SaveAs function to create the PDF; that will preserve the spaces.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]