Primary menu issue: Menu text outta screen area

Running lates WP with version 3,5 of Base Pro on fleksjobbernetvaerket.dk Primary menu issue: When the menu is open, and I point to submenus, the expand to the right. Thats ok - but as you can see on https://snag.gy/6ScO2d.jpg - since its the last menu, the submenu's cant be displayed properly ... as the text is out of the screen area ... Me is confused thanks Knud