I have a template that uses several 1px high borders - right now, I'm accomplishing with either a spacer image or a cell with an nbsp;. These don't display in the Gmail client on Android (I know this happens in 4.4 - haven't tested other versions) or iPhone. I seem to remember something about Gmail not respecting or rendering cells that are 1px high. Has anyone else seen this?

Gmail on Android Android 6.0

Here's the link to the builder code: