I'm getting a lot of views that look like the attached. (In fact, most of them do.) I simply have too many records that do not have or need custom thumbnails. Going back to Andy's custom views request, it would be good if I could remove the Thumbnail icon from the view altogether.
Alternately, it would be nice if I could define a default thumbnail for a given [custom] entity. A RED clip, for example, would get some type of RED logo. That would be a lot more useful that staring at an "Upload Thumbnail" box on nearly every page.
(EDIT: Added a screencast of how to hide the thumbnail display - Isaac)