A really minor one. Only fixed couple of those dire bugs that need fixing, also includes the new Zeppelin. 🙂
Just to throw a bone regarding the 1.7 update; Sadly we are both busy IRL right now, and to my knowledge Forge is still in beta, so the update won’t be done anytime soon. We might do more stuff for 1.6.4 in the meantime.
You can read the changelog here.