Featured images don't work for me, either.

All my posts’ feature images are far bigger than 1100 x 500, but they still don’t show up no matter what I do. I’ve tried using even bigger images for my previous posts, submitting new posts with feature images after installing the theme to see if those ones would show up, and even seeing if there was something in the CSS that was turning them off somehow, but nothing works.

(Also, there’s an ugly gray border around my header image, even though it’s exactly the recommended size. Any idea what to do about that?)