Web attachments: File does not begin with '%PDF-'

I am getting this error when I am trying to open a PDF file that I attached to a form through the web. This only happens with PDFs that are stored in a notes document

and I am trying to open with a hyper link that uses:

<a href="“+@Text(@DocumentUniqueID)+”/$File/“+@AttachmentNames+”>

This seems to be a relatively new problem. I did a google search, and Adobe

has some information relating to a MIME encoding problem. When I do a

“Save Target As…” it always saves a 16kb file regardless of the file size.

Any ideas?