Comment 4 for bug 515237

attached is an example of the same problem occurring with a star shape. The second star is an exact copy of the first star. I just copied it and then rotated it randomly until the 10 nodes turned into 11 nodes. You can tell which node is going to break apart when you edit it, because the rectangle for it is a bit smaller than the other rectangles when using the node editor. The star that still has 10 nodes will not break apart when you edit it.