Hmm. Doesn’t seem to work that way for us. e.g. we have a featured image for this post http://brettjarman.com/cb/paleo-friendly-raw-blueberry-cheesecake-by-jules-galloway/. The image shows up on the blog roll http://brettjarman.com/cb/blog/ but not on the post itself. the only time we can get the image to show on the post is if we insert it.