0.6.8 is stable and production ready, the later versions of the 0.6 branch has "issues". No offense, but the 0.7 branch is fairly unstable from my experience. I have reproduced all the open bugs with a production dataset, even when tried to rebuild it from scratch after a complete loss.
If you have a few month before going to production your best bet is still 0.7.1 as it will stabilize but the switch between versions is painful. /Attila