I've just compiled 3.4.2 with support for FLTK graphics. And the commands
>> graphics_toolkit fltk >> sombrero
give a very nice looking result. However, none of the menu items in the Figure window respond to the mouse; nor can I close the window with my window manager (I'm using gnome, under Ubuntu 10.10). Have I missed out on a necessary package or library here? I can plot new graphics in the window, but I can't pull a 3D graphic around with the mouse, as I can with gnuplot. The window will show the graphic, but acts "dead" otherwise.