I got 0.1 installed (it's been a good time since I installed the last RC) and it looks great.
One thing I remember was happening in prior versions, and still persists, is that when I delete a message the next message that gets selected should, in my humble opinion, be the next message in the future, and not the previous one.
I hope I'm clear. It's just that, as the default ordering is by date descending, I normally prefer to go the the next unread message, but the oldest one.
List info: http://lists.roundcube.net/dev/