I've got a really quick question. I've gone ahead and installed the new WordPress 3.0. My blog is brand new, so I didn't have to worry about incompatibility and such. I've switched over to the new 'Twenty Ten' theme which supports 'post-thumbnails' (Which I confirmed by checking the functions.php), and yet I see absolutely no UI in the Edit Post section in the Dashboard letting me select (or 'add') a Thumbnail image for my posts.
Why is the 'Add Thumbnail' interface not showing in the edit post section?
Any help is greatly appreciated. Thank you.