I found problem with the Ancient Lorekeeper Archtype for the Oracle. After you choose your mystery the skills will not be updated. The added class skills stay black and you don't get the class bonus if you put ranks into it.
It works correctly if you delete the archtype or add an archtype from previous releases.
That's working correctly, as stated in the book:
Class Skills: An ancient lorekeeper adds Knowledge (arcane) and Knowledge (local) to her list of class skills. Whenever she makes a Knowledge check of any kind about a question regarding elves (creatures of the elf subtype), the ancient lorekeeper adds half her class level on her check. This replaces the bonus skills the ancient lorekeeper gains from her mystery.
I will add that text to the archetype though.