Usefull wikilinks is a menu-header, it cannot have an url.
Ah, on Windows it looked like the menu-items above it (now on Linux with newer FF it is more clear).
The menu-header has a hoover effect of underlining the text, which I (and I guess more) suggested it was in fact a link.
(It
is surrounded by anchor (<a>) tags)
Maybe fiddle with the css?, but only if you have too much time on your hand

Bart