> the attached code compares six variants of a stroked half circle drawn > with a circled and squared pen (left and right column) and with > linecap set to {rounded, squared, butt} (top to bottom). i just get here with 1.003: hahe at hahepc1:~$ mpost pens This is MetaPost, Version 1.003 (Web2C 7.5.5) (pens.mp it freezes! Regards, Hartmut