Mail: Attachment goofiness

Mail 2.1.3, Mac OS 10.4.11

I want to attach 3 files to a mail message, all saved (through Print
menu option) as PDFs with that extension. When I select the messages
to attach via the button in the Mail window or by dragging the file into
the message, two of the documents show up with the PDF icon and the name
and size of the file; the third document displays the content of the
file. Two of the three files started out as MS Word docs and one of
them is the offender here; the other is behaving as I expect it to.

Anyone know why and, more importantly, how I can make that one look like
the others ‹ icon with name and file size?

Thanks for your help. Be gentle ‹ I'm old and fragile.
--
-Barb, Mother Superior, HOSSSPoJ
http://www.jamlady.eboard.com;pics of my no-knead bread posted
Laissez les bons temps rouler!