XYOUTS was not recognizing the SIZE keyword after a change in the call of an internal routine.
[XYZ]THICK and CHARTHICK were sometimes mangled due to the fact that there is only one thickness for all lines in plplot, including drawing Hershey fonts.
TICKSIZE of AXIS was, if not precised, dependent on the position in the plot (code was using internal plplot coordinates).
XYOUTS was not recognizing the SIZE keyword after a change in the call of an internal routine. [XYZ]THICK and CHARTHICK were sometimes mangled due to the fact that there is only one thickness for all lines in plplot, including drawing Hershey fonts. TICKSIZE of AXIS was, if not precised, dependent on the position in the plot (code was using internal plplot coordinates).
1901 bug cured.