Well, not the beta package itself but a more recent Subversion snapshot. Release of Tiki 4.0 is imminent so I've been fixing things here and there to improve visual appearance, placement of items, and so on.
Tiki 4 has so many changes that it'll take a while before everything is documented, but it's becoming increasingly powerful and polished, as long as regressive bugs are squashed so we don't take two steps forward and one step back. More details later.