When I try to open a PDF that I just received in Foxit Reader I receive this error message:
This document contained certain rights to enable special features in Adobe Reader. The document had been changed since it was created and these rights are no longer valid. Please contact the author for the original version of this document.
If I view 'Document Properties > Security' then I see another message at the bottom of the window:
This is document restricts some Acrobat features to allow for extended features in Adobe Reader. To create a copy of the document that is not restricted (and has no extended features in Adobe Reader), choose File > Save a Copy.
This doesn't make sense. Why can't I open this PDF in Foxit Reader? Shouldn't I be able to open a PDF in a PDF reader that is not made by Adobe?