The new version is awesome. Adding (and now buying) books is getting better and better all the time. Between it and all the awesome new plugins, it feels like Christmas!
One small suggestion, some of the new windows don't remember their previous sizes, cover choser in particular. It would be nice if they remembered the last size they were changed to by the user.
With all the fast-paced development going on, how do you all find the time to actually read some books!