I'm used to use the keyboard layout option to type the accentuated characters in Esperanto. This option is in System Settings Keyboard Layout Options Adding Esperanto circumflexes (supersigno) To the corresponding key in a Qwerty keyboard. It worked great but since I upgraded to Ubuntu 12.04, this option has no effect. I'm using Ubuntu in French with the keyboard layout French (variant) and Gnome-shell. I tested on another computer with Unity and there is the same issue. Is it a known issue? I did not find anything about it…