Now, the problem is that the user (if using Adobe Reader) cannot save data entered into the attached document. Using Acrobat, I reader-enabled the attached file "mypdf" before attaching it to the parent pdf. Somehow, when it becomes attached, it just loses this functionality. Even when I reader-enable the parent pdf, it warns me that it cannot reader-enable attached files.
This seems like a huge flaw, so I imagine there's a solution. Any ideas? Anyone face this problem before?