Can't see e-mails in shared folder

I am using Outlook 2007 on an Exchange 2003 server and can open a shared
folder from another user. I can read all of the e-mails listed there except
for the ones from "System Administrator" (usually the undeliverables). The
e-mails open but there is nothing in them. All of the other e-mails in this
folder open just fine. And the owner of the folder can open and read these
e-mails. Am I (or the owner) missing a setting somewhere? Or is this a
setting on the Exchange server that won't allow System Administrator messages
to be read by anyone other than the original recipient? Thanks!