I have Oxygen Theme, which list featured pictures in archive, tags or categories view. If post haven't add featured picture then in the listing view (archive, tags or categories) instead of the featured pictures the theme preview blank grey square. Preview: http://www.basicsailor.com/category/sailing-vacations-2/
Probably I need to change archive.php, but I didn't know what to remove/change?
Can antibody help me?