According to the release notes, the new Radeon Software Crimson Edition 15.12 WHQL-certified update also fixes high idle power usage on Windows 7 when running Radeon Settings and a couple of other issues seen with Radeon Settings.
Unfortunately, the new update does not appear to fix certain downclocking issues previously noticed by some users but does fix fan issues. The release notes come with a hefty list of known issue in various games so AMD will hopefully release another update in near future that will take care of the rest of these problems.
As always, you can find the new AMD Radeon Software update at AMD's support page.