Mac OS X 10.5 added some great features, but it took away a few, too. One feature I sorely miss from Tiger is the ability to display hierarchical menus in the Dock. That amazingly handy feature was replaced in Leopard with Stacks -- useful in its own way, but not a tool that fits my style. Thanks to the efforts of third party developers, however, my beloved hierarchical menus live on in Leopard