Robb Sherwin noticed that there is no search link (although I can see it when I’m logged in). In the admin panel, I see an area for “search” settings, but nothing that turns it off for guests. In fact, there is a setting for guest search flood limits, which isn’t even set.
I would assume it’s disabled for guests so that it saves bandwidth.
Items such as that and the members list look to be placed within tags that toggle what’s displayed depending on whether a user is logged in or a guest.
Similar to this is the ‘logout’ option which is viewable if logged in. If not logged in, this is hidden, but login/register are both displayed instead.
These are all coded into the php pages themselves, and not available to switch on or off in the admin panel.