This should be fixed now for all browsers.
In MSIE you will see and be able to change the drop-down list only on "My Profile" page (near the bottom):
http://forums.psychcentral.com/usercp.php
In Chrome/Safari, you should be able to see the dropdown list from any page, but it won't display the images of the moods themselves until you pick one. This is a limitation of those browsers.
In Firefox, you will see the full dropdown list of moods along with the images of each.
Best,
DocJohn