Yes, the SVG file is correct if I exit gnuplot. Thanks Marked the bug rejected, because it is not a bug.
** Changed in: gnuplot (Ubuntu) Status: Needs Info => Rejected -- gnuplot outputs non-valid SVG https://launchpad.net/bugs/58778 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs