I've put few elements in normally hidden menu bar, like "RSS icon" or "Downloaded files icon". After showing menu bar they look properly (e.g. icons highlight on mouse over), but won't execute action - menu bar will hide upon click on them. I've also put search bar there, selecting items from it works properly, after opening select search engine all other elements start to work, yet, after executing an action menu bar won't hide again until some menu is opened and closed. At the moment I'm using FF 5.0, but problem exists in 6.0 as well