[imp] Unable to see messages in one Inbox

[James Turnbull]

After upgrading to Horde 3.1.1 and IMP 4.1.1 I have a single user who
cannot see the emails in the their Inbox.  The headings are displayed
and a total count of messages but no messages are displayed.  The
backend is Maildir's and Courier IMAP.  All other users are fine.  Is
there a setting they could have changed that might account for this?

Regards

James Turnbull