Originally Posted by Elfwreck
If the PDF is a "portfolio" (an option available in Acrobat 9) or has attachments, those are not likely to be viewable third-party PDF viewers. The solution may involve extracting the PDFs and then combining them into a single actual PDF, instead of one with attachments or portfolio sections.
Thanks for your thoughts. If I open the original 200-page PDF in Acrobat Reader 9 or with Evince, it shows 200 pages. If I import it into Calibre, add metadata, and then save it to disk with metadata, it's truncated (in the number of pages, not in file size), even if I open it with Acrobat Reader 9.