I confirm Clio's observations. That's something new and LibO specific OOo 3.1.1 and 3.4-dev do not show those extra points.
I think solving the extrapoint issue will also heal problems with PDF export.
Bug 31851 - Artifacts (vertical short lines) in PDF-Export indeed seems to be concerning the same problem like this one, please see my comments there when I mark it at a DUP of this one, because here we have collected much more information.
Unfortunately I do not know to whom we can assign this issue.
I confirm Clio's observations. That's something new and LibO specific OOo 3.1.1 and 3.4-dev do not show those extra points.
I think solving the extrapoint issue will also heal problems with PDF export.
Bug 31851 - Artifacts (vertical short lines) in PDF-Export indeed seems to be concerning the same problem like this one, please see my comments there when I mark it at a DUP of this one, because here we have collected much more information.
Unfortunately I do not know to whom we can assign this issue.
@clio:
Good shot!