Updated, too.
Looks quite nice and at least now there are breaks in paragraphs in my epubs - so less empty spaces and page turns. Still don't care for the Facebook thingy, though.
Unfortunately fonts support hasn't been fixed, so some fonts (like Linux Libertine) still don't work with epubs (with kepubs they do).
I don't seem to have any epubs with that "no margin on top problem" either.