Comment 8 for bug 548918

    The extra point is confirmed. Inkscape will sometimes do this, for reasons that I do not understand. It has to do with whether a path has been formally closed or not. For example, if you go into the XML editor and select this particular path and remove the 'z' at the end, then the extra point in the hpgl output will disappear. The 'z' is an svg command to close the path, which in this case is redundant, and leads to the extra point.

In any event, these changes have been committed to bzr rev 9262.