Hesitating to suspect anything but operator error (lol), every different way I try to construct a regular dodecahedron (equal angles, sides, faces-12 pentagons), when I place my 72 degree vertical sides at the edges of the base, all aligned, the end points of the vertical planes do not meet. My edges appear to meet, my angles appear to be equal, and the faces appear identical. I have had the same results with the polygon tool and after constructing my own pentagon. Is something broken?