It looks like a site administrator had a document checked out prior to
our upgrade to MOSS. This site administrator now cannot see the
document in the upgraded environment. Her coworker (w/ lesser
permissions on that site) can see the document. I can also see it, and
it says it is checked out to our Farm account.

I assume the check out ownership got transferred during the upgrade and
the farm account overtook it. Why, though, can't the site administrator
(who had the document checked out at the time of the upgrade) even see
the document while her coworker and I can?

Also, I tried going in as a site collection admin and checking in the
document. It told me it wasn't checked out. I then tried to discard
checkout and got the same message.

What the heck is going on?? Is there any way to get this document back
to normal, checked in, and visible/editable to all? Any related
experience/advice is welcome.