I am not sure if this problem is one of objection creation in Blender, or if it is a Poser rendering problem.

I've been creating a door handle, the handle has a circular base where it connects to the door.  It's supposed to be circular.

The angles curve properly around the edges, but not on the front and back.  In fact, when rendered the edges seem to split apart.  I've double and triple checked to be sure that I don't have duplicate edges.

The first image below is a render, with red circles to highlight the weird thing going on.  The second image shows how the geometry looks in Blender.