So in PS, arrowheads are drawn with linewidth=1. The other renderers need modification to emulate this behaviour so that arrowheads are unaffected by the current setlinewidth style.
(The alternative of trying to make arrowheads grow with linewidth would be much more complicated and, I suspect, less attractive or useful.)
Also, in GD outputs, lines are being extended at each end by
half linewidth. In PS the line ends at the coordinate independent
of the linewidth.
Input file: b303.dot
Fix: Fixed in CVS (at least for those renderers that support wide lines).
Owner: ellson
Status: Fixed (6 June 2003)