I've just installed the latest version of gnome-shell and it doesn't have window buttons? Is there an entry in gconf-editor that I can change to enable those buttons? In general, how do you tweak gnome-shell?
You can do a certain amount of tweaking using gnome-tweak-tool. In Fedora 15 you can use yum to install it. No sure if it is yet available for other GNU/Linux distributions.