what theme are you using?
Twenty Twelve, for instance, does not use the featured image as header image.
We are using 2012 and the option was still there to set a feature image so I assumed it still worked that way. Some of our “editors” seemed to like that feature. Do you know if they are going to make it work with 2012 or another way for it to do what the feature image did?
I’ll see if they want to go back to 2011.
Thanks
check this adapted version of header.php for a child theme of Twenty Twelve:
http://pastebin.com/N2135HkM
and also add this to functions.php in the child theme:
add_image_size('header-image',960,250,true); //for 'featured image' header image
you might need to ‘regenerate’ the post thumbnail, for instance with this plugin http://wordpress.org/extend/plugins/regenerate-thumbnails/
imho, there will be a duplication of post thumbnails, as the post thumbnail already gets shown above the post title in the index page and in single posts, and in pages when you use the ‘front page template’.
