When I'm in the messageboard area (right before entering a messageboard) there is the option to add a board to my favorites. That's right.
Below, on the same page, are explainatory buttons: one is the red check mark, and its tooltip reads "Add this board t Favourites". That's right. But the next button, the black [b]X[/b], has the same tooltip! Probably noone will ever read it, but I did... please fix it when you have some time to spend...