I just upgraded to Mac OS X Version 10.3.2 and my mail was upgraded to Mail 1.3.3 in the process.
With the upgrade, Apple has improved the Mail experience by hiding people's actual email addresses.
I wonder why they feel that it's better that way.
I wanted to change the display of the To/From field, in the header, to display actual email address.
Right now it displays: Lisa Smith
It used to display: Lisa Smith <firstname.lastname@example.org>.
I just figured it out how to change it back:
Go to [ VIEW ] [ Addresses ], then select [ Show Name and Address ]