The new flyout menu feature in WP 3.3 fails in some cases. When I am at the main page of control panel and hover the mouse on the menu items at the left hand side menu, no flyout menu appears. But if I am at other pages, say, All Posts, flyout menu works fine.
Other dynamic menus such as the visibility updating menu in post editing page also don't work.
If devformatter is disabled, all problems are gone.