For some reason pingbacks stopped working on a blog (wp 3.3.1.).
Seems like all needed checkboxes are checked, <link rel="pingback" href="<?php bloginfo( 'pingback_url' ); ?>" /> line is in header, xmlrpc.php file is in folder. What else to check?
I tried to put a link to previous posts (“selfpinging”) and even to external wp, but nothing happens. Looks like they just don’t even try to go anywhere. Any suggestions?