3D-Box style preferences misleading

[Hachmann]

first reported here (in the comments): https://bugs.launchpad.net/inkscape/+bug/1363436

The 3DBox tool preferences have the option to set a style, but all I get, regardless of the chosen style, is a blueish-purple 3D box, which looks 3D because of this and because of the different color shades, of course.
Why can I choose a style here at all?

jazzynico:
"Confirmed. The 3D box style settings doesn't seem to work exactly as the other tools. It quite works with the "Last used style" option, but you have to select and modify each side independently (see http://tavmjong.free.fr/INKSCAPE/MANUAL/html/Shapes-Boxes.html) or change the values in the preferences.xml file directly (apparently no other way to reset, see https://answers.launchpad.net/inkscape/+question/159348).
But "Use tool's own style" seems to be broken."