This is very strange! It sure sounds as if you're entering the information
the same way I did -- but it saves properly here.

Regarding permissions, I was thinking it's a Windows user profile
permissions issue. I know that corporate computers often have various
limitations and restrictions on the user profiles, and I was wondering if
those might affect the saving of the document properties. [As you can
probably tell from that last statement, I don't really know a lot about this
type of thing! :-)] But since Word and Excel save the properties properly,
that's probably not the issue.

However, I was just messing around, adding stuff to the doc props to see if
it would stick, and after saving and opening one of the files I was playing
with, the author and company fields are blank here, too! I don't know what's
different about this particular file, though. I did run the document
inspector, and I had it look for document properties and personal
information, but I did not click the "remove all" button. In fact, I just
clicked cancel. I cannot reproduce it. Hm....

You might have to break down and call Microsoft product support for this
one, Athena. Sorry.

Oh, you know, here's a question. In Office Button | Options | Trust Center |
Privacy Options, do you have "remove personal information from file
properties on save" checked? The option will be unavailable until you run
the Document Inspector and click "remove all" in the "document properties
and personal information" section. After that, the "remove personal
information from file properties on save" is automatically checked.

This is a document-specific setting, so if you're able to save your author
and other information in some documents, but not others, this could be the
issue.