wrote:

I reset the Messages view to its default settings, which (among other
things) is to ARRANGE BY DATE with NEWEST ON TOP. When I did this,
more messages appeared (31 in all). If I simply switch to OLDEST ON
TOP, then I only show 18 for the same time period. In OL2003 (using
the EXACT SAME PST file), there are 142 messages for the SAME time
period!!!

I simply don't see how this is possible. Can you post screen shots
somewhere?

If I switch to "Unread Messages in this Folder", then it appears that
all of the unread/hidden messages appear in OL2007.

The searcfh folder will tell you where those messages reside. Obviously if
the Unreasd Mail folder shows them, then they're there.

Switching back to
Messages makes them go away again. Finally, if I look in the "Unread
Mail" Search Folder, then it also appears if all of the of the unread/
hidden messages show up. Going back to the Inbox, things are still
missing. Something strange is still going on! Any more ideas??

I suspect you have a filter or are sorting on an unexpected column, but if
you could show us what you see, we might be able to pinpoint the issue.
--
Brian Tillman