The only "compatilbility pack" I could find was for Office 2007. I don't
have that version - I don't even have Office 2003 - I have Office XP SP3,
which until yesterday was fully updated according to the Microsoft Update
Now the Microsoft Update site is offering me SP1 for Office 2007 - which is
listed at 50.1MB exactly. It may well download further data during
installation. I'm not going to test that theory. FWIW, I did get the seven
or eight Windows XP updates yesterday and installed them without incident.
The Office update is now (still) hidden, with the admonishment that I'm
risking system security by ignoring an important update.
The latest update available for Office XP at
security update dated 10/6/2006. Nothing from yesterday.
It seems more like some kind of false positive in the detection algorithm.