One user getting this error on their mailbox, and no mail shows up in
the mailbox. Tried on a couple of different machines, and the error
happens on all of them. This started happening mid morning after user
had been in mailbox for an hour or two.

-GW 8.0.3 and just moved post office from Netware to Windows 2008 on the
-Ran GWCheck on user, Analyze/Fix Structure then Contents with fix
problems checked.
-Ran again with Reset Client Options
- Tried removing and adding various columns to the mailbox display area

Sent items show up. Trash shows up. Calendar OK. I can search for items
and find them. As a work around I've made a search folder for email and
messages show up there.

What could be causing this error, and how can I fix it?