PhoenixMiner 2.7c is officially released. In addition to the changes in 2.7a, and 2.7b, we have added support for
secure stratum connections using SSL (supported by ethermine.org) to prevent the increasing IP hijacking attacks. To connect to a secured pool, use the
ssl:// prefix (e.g.
-pool ssl://eu1.ethermine.org:5555). We have also Added support for
solo mining (HTTP GetWork protocol).
We are switching our attention to 2.8, which will include a lot of small improvements, as well as some big ones but we prefer to keep them confidential for now in order to avoid giving any ideas to the competition

We also continue working towards dual mining and Linux support as our next major milestones.
I tried 2.7C. It seems stable. But there is no hash rate increase.