[Ripplinger]

The epub looks perfect in Adobe Digital Editions. I'm not sure about the mobi converted file though.

In Kindle for PC, the mobi shows a square box like a typical missing character before each em dash. When I check it with Kindle Previewer though, it looks perfect in all 3 choices whether Paperwhite, Kindle or KindleDX.

I'm not sure I should risk the odd boxes or spacing issues for some people now, or if it's better just to let the orphans stay as they were.

Edit: The above results were converting as "old" mobi type, which I usually prefer to keep the file size down. I then converted it as "both" in the Calibre options and now in the Kindle Previewer, the Paperwhite view shows a space before each em dash. All else looks the same as in the "old" mobi format. I really didn't expect to see a difference there, but glad I tested it.