Android support v23.1.0 update breaks NavigationView get/find header

Question

I have been using the v23.0.1 support library until now with no problems. Now when I switch to the new v23.1.0 library I am getting a null

Answer 1

it is a bug at 23.1.0

23.1.1 fixed

https://plus.google.com/+AndroidDevelopers/posts/ebXLByBiEBU