Brian , this seems to be serious mistake and which could lead to many account disabled :shock: . You calling " ?php get_header(); ? " which is leading to this :?: , i noticed this while i was customizing the theme
. by mistake land on 404 page. Please solve this problem as soon as possible.
Displaying adsense on non content based page ( error ) is strictly prohibited
what i can do is simply remove " ?php get_header(); ? " until you make correction