JoomlaWorks just released v2.5.1 of K2, a maintenance release, fixing some minor issues as reported by the K2 Community.
This release maybe "maintenance", but they have gone through some "bigger" changes regarding content setup workflow and frontend editing.
Read More on : http://getk2.org/blog/item/196-k2-v251- ... -available
Download at : http://getk2.org/