Are you running a standalone copy?
Only certain features are for a standalone. One look at a users profile in the gallery and you can see most the profile enhancements the whos online box has the link to online.php. Mature content flag is on the upload page when a user uploads a photo. Most all those little icons on showphoto are ajax most all that is new.
You tell me you dont see all the changes from 5.62 to 6.0?