Pickaxe has been added in the game and can be used for mining the stone. Also, day/night cycle is now available - you can set the length of day and night. Additionally, we have improved the character's and barbarians’ animations after death (known as rag-doll). Pathfinding for AI has been implemented that would help barbarians to navigate in more complex environments. Lastly, we've also added several new blocks and fixed a lot of issues with structural integrity and lights.
https://www.youtube.com/watch?v=WdtyuDQcHcQ
Full list of new features and fixes: http://forums.keenswh.com/post?id=7338905