The new version is based on a brand new architecture, and it seems pretty solid.  They just don't have all of the tools ported, so now you kind of have to switch between old and new workspaces.  When they get that fixed and make it play nice with Poser I'll be much happier with it.  The two coolest new features are the near photorealistic preview and mixing dynamic and keyframed animations.  So, yeah, I hope they can work something out with ef.  Is this a rumour or just wishful thinking?