Hi,
I loaded a file that contained lines with arrowheads into version
4.1.6.31 and none of the lines displayed the arrowheads or printed the
arrowsheads. When I clicked Line/Fill, the lines had arrows selected.

also

I drew a object with one side curved back into the object and gave it a
4pt line. The accute angle created at the corners where the curve bends
back into the object have holes in the line.

-paul-