Could be a caching issue. If you look at the image path, you'll notice it's not the default WP one. It's an image Beans has processed, and one which disappears when you flush the image cache.
Try removing the feature image, flushing your images (Appearance -> Settings -> Flush images), clearing browser cache, then setting the feature image again. Maybe overkill but this should rule out caching.
The only thing I can think of is that maybe the beans_post_image() action has been modified or that you've somehow hard-coded the path to the image.