==================== Bugfix for mdef + groups. The mdef modifier treated the cage object as a sort of parent, which meant that transforming the cage object also transformed the mesh. However, this behaviour is different from e.g. armatures, where transforming the armature object has no effect for the modifier, but instead this transform is taken into account by the fact that the armature is usually the parent of the mesh. For groups and duplis, this basically lead to the parent transform being applied twice. So, now transforming the cage object will have no effect, except if you make the cage object the parent of the object.