Best Answer James B† , 27 March 2013 - 11:25 PM
Hi there, those indicate that the top item is an anchor for the dropdown, not a link. Unfortunately the navbar doesn't allow for top items to be dropdown anchors as well as links to other pages, this was how it was designed by the team at twitter bootstrap, I'd imagine due to the rise in touch screen devices. People on phones and tablets wouldn't be able to activate the dropdown without accidentally going to the link etc.
However, there are some premium navbars in the store which allow the top item to be a link and are styled better than the classic nav.Go to the full post