For unknown reason, my list of contacts suddenly stopped displaying in
Outlook when I click on the 'Contacts' button.  I click on the button, the
upper left panel then says 'Contacts,' but on the right the listing of e-mail
headers continues to be shown.  I can right-click on the 'Contacts' button
and am given an option to open Contacts in a separate window.  This does
work, but I want the listing to appear in the current window - as it always
did.  I'm using Outlook 2003, with Win XP Pro OS.

Thanks in advance for any thoughts on this.