there is a pending pull request on the Traits github repository introducing some changes to the Traits adaptation mechanism. The changes are backward compatible, but if you are using Interfaces and Adapters please give it a try to make sure your applications work smoothly.
In summary, we deprecated the traits.protocols package and substituted it with a new traits.adaptation one. The new one is smaller and well-tested, and fixes a few issues with the adaptation mechanism. In the updated docs there is a section about it, including a guide to how to update your code if you were relying on those features.
All the best,
-- Pietro Berkes Scientific software developer Enthought UK