Just a moment...

(filebin.ca)

I've tested this file - with hardware acceleration enabled I get artifacts, with it turned off I do not.

Hey, that just may have fixed it.

updated my profile to include some information.

These sorts of artifacts have been appearing more and more. They aren't there when I start a new sketch, but after I add a few objects they almost always appear - at this point they almost never go away.

Often they look like geometry of things that I've had in other files - files that parts of the current sketch may have been copied from.

If I export an image it appears normal w/o these lines. It's becoming more than a minor nuisance and I'd love to know how to make it go away.