Hi,
There appears to be a metapost bug with square pens and dash patterns:
\starttext
\startMPcode
pickup pencircle scaled 1bp;
drawarrow origin -- (5cm, 4cm) dashed evenly;
pickup pensquare scaled 1bp;
drawarrow origin -- (5cm,-4cm) dashed evenly;
\stopMPcode
\stoptext
Note that the second arrow is not dashed at all! This is not due to the
thick pen.
Aditya
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