It was a mystery for a while for me too. Ian (and me) have zoomed our forum browser window too large to accommodate all of the menu items. Recently Victoria added a new menu item "Unanswered Threads" (Quite a wordy menu item). When that happened and when your window was Zoomed past a certain point, menu items were moved under a sub menu represented by the ellipsis (...) Unfortunately, instead of dropping the right most menu items, the new forum software consumes the first menu items instead. It's an annoyance, but the price we have to pay of old eyes and small screens.