In case you hadn't seen it, bug 590640 landed in the Daily builds
last Friday (i.e. from Saturday's builds).
From a quick test, this fixes the issue where you're in the
non-default font, start writing a list and it reverts to the default
font.
It doesn't fix the issue where you go to the end of the line of
non-default font and start typing there, so I've created
bug
756984.
Can folks take the latest Daily builds for a spin please, and see if
there's other issues outstanding, if there are, then getting them
filed now will be useful, whilst we have some work happening on the
editor.
Thanks
Mark.