Comment 7 for bug 1235504

>> For full ellipses I now create 4 elliptical arcs manually

I believe that two arcs of 180 degrees each would be sufficient here. This is what is normally used in the XML editor to represent a full circle.

The problem here is not that the Bezier representation is poor, the problem is that the endpoint at (1,0) or (-1,0) is wrong. This would be fixed by using two arcs, and the bbox would then be correct.