I've noticed that if I cut and paste text from one site and paste it into the editor, the font changes to match what I copied. I don't like that, but ok. But then I noticed that everything I type after that is still that copied font, even if I delete everything on the page and start all over. I find this annoying...
From what I understand, xenForo uses TinyMCE?
Any chance you guys can take a look at other editor's? TinyMCE has alot of nice features, and is cross-brower, but is very buggy and unstable.
Have you looked at a jquery powered editor?
This one would be nice if you wanted to give the admin the option to choose between the BBC editor or HTML for certain boards.
This one seems really sleek & fast...