release 1.2.1 (and 1.2.0)

start gnumeric; fill two columns with some integers and start chart
guru; select XY plot type; press 'Forward'; select Series1 and choose
the integers in the two colums as '(X):' and 'Y:'; select Style tab
and change line thickness to a non-default value; press OK and place
the chart;

now either:

right click on chart; select 'Properties'

or:

save the workbook, close it, and open it again

-> the line thickness is reset to default.

This happens also with other style settings within the Style tab of
Series1, but not always. It seems to depend on the combination of
settings. With current CVS, I got crashes while testing this issue ---
this is a separate bug report.