GDI+ produces rendering glitches that appear as unwanted diagonal lines when displaying perfectly horizontal lines that extend off the Bitmap edge when anti-aliasing is off. This was previously observed.

I'm not sure why this only now started happening.

It's worse in WinForms:

This was previously seen in #316:

I fixed this glitch by applying a slight offset to one of the points of the line so it's not perfectly flat. The tilt is invisible to humans, but it fixes the glitch.