PROBLEM: 12.1 version of Word 2008 will not open WinWord .doc files?

I have a folder of word documents -- all of these opened on Office 2008
with the 12.0.1 patch.

I updated my Office 2008 with the manual 12.1 download.

Now, only *some* of the documents will open when double-clicked.  
There's a finder action that makes it look like it's opening, but it
doesn't.

A "File --> Open" works to open the documents.

I can "save as" the document and just rename it and it works to open
the "save as" document.

I passed some of these files on to a colleague in another department
and he couldn't double-click open the files, either.


It's *possible* these documents that aren't opening were created on
some version of WinWord (I'd have to track this down as to what version
if that's the problem.


Anybody else seeing this?

- Steve