Comment 33 for bug 170049

Thomas: those three are fixed in r9295. Also fixed is wrong positioning of guides.

However, I don't know whether we'll be able to release with this change: 3D boxes are flipped vertically. If I don't find a way to fix this, I'll have to revert to the old coordinate system, or remove editing support for 3D Boxes created in 0.47 and earlier.