Hi David,
Oh, sorry about that. Here it is again at the bottom of this message (at a minimum so you could see what I was talking about).
You didn't tell me if this is the only document suffering from this issue or if there were others.
I do expect Word's export to provide the PDF suffix. I'm just wondering if there's any chance that this was changed. It can be done (I just did it but it would have to be an intentional act). But when I tried to open this document it went to word and because it didn't recognize the structure of the document it asked me to tell it what kind of document it was. (In other words, it wasn't going to happen.
I'm not saying this DID happen, only that it could possible explain what you are seeing.


Thanks for your interest in this problem. So far it is only one file (albeit recreated from the same Word source file multiple times).
I checked the email that I originally sent and the file most definitely had the ".pdf" extension. The person receiving it on windows also reported the .pdf extension, but it still opened with Word. I thought Windows was pretty basic with it's file opening routine (i.e. basing everything on the extension) but maybe newer versions of Windows take other things into consideration.