I visited a SE site I'm not registered on, and got the "Welcome" header. I middleclicked "FAQ" in the Welcome header to open the FAQ in a new tab, but nothing happened. The context menu (when rightclicking the FAQ link) doesn't contain "Open link" either. Basically, it doesn't seem to be a real link, but a half-working JS imitation of a link.
Browsers tested: Chrome 7.0.517.44, Firefox 3.6.10