I can’t upload pictures so I’ll have to describe it. So basically I drew a one pixel thick line using the pencil tool, and at ~95% zoom, the way it was being rendered led to segments of the line being lost by the aliasing, and looking like the line is broken when it in fact isn’t.
What document size? Also I think you can post pictures now
Fix available in 2.0.1.10-dev Changelog 2.0.1.10-dev