I am completing my first postdoc and I had a pretty bad experience with my current adviser. I finally got to publish something, contribute in a grant writing etc., but overall it hasn't been great...
Now, I am going to start a new postdoctoral appointment under the supervision of a faculty I have been working with for several years and I will apply for tenure track positions once this last appointment has ended. I am pretty sure that my new adviser will be able to provide very good recommendation letters for me in the future. So the question is, will I need to provide recommendation letters from my current adviser? What if those are not good?