File this post under, "isn't that interesting?" I came across this query detailing the challenges in rendering and animating a LEGO minifigure. It seems that defining the armature that defines the minifigure "skeleton" can be difficult, the result making the torso look a little strange.
I won't pretend to know what any of these people are talking about, but it does make for an interesting read.
(Via BlenderArtists.org)