> It is one of those things I never remember - winding rule of > truetype and postscript are different, one is even-odd, the other is > non-zero. [...]
You are on the completely wrong track here. What I'm talking about is strictly local and not (directly) related to having two different contours. For example, to recognize stems and serifs, the contour must be the same. In case you are not aware of how the auto-hinter collects 'segments' and 'edges', please read https://www.tug.org/TUGboat/tb24-3/lemberg.pdf which still gives a good overview (inspite of its age and some changed details here and there). Werner
