Something I just discovered today, using 1.3.3.3 (Linux) was that, even though I can set a keyboard shortcut for an em-dash, it will not work in Story Editor, though it does work in Edit Contents mode on the main screen. Since I've never tried this before, I don't know if it's a feature that was lost or never existed, yet seems intuitively that it should be there.
I also wondered if there should be what we might call a "smart" shortcut insertion with this, so that in addition to using a shortcut to make the em-dash it will also add a following space. I'm not sure I can think of a situation where I wouldn't want a space after an em-dash. Greg