Some of opendesktop project’s sites require independent login. E.g. www.opendesktop.org and pling.
If that’s intentional, they could be managed in better way: top toolbar could be reusable applet (it looks like it is), and menu login section in main menu could have counters for all current logins, as well as action to logout from all of them. Could be optional submenu (or menu section) with list of current logins, which would allow visit or logout each, or whatever you find yet better. In second case ‘logout all’ could be in this menu.