Feeds are broken on this site if you’re accessing them via, e.g., http://www.goesping.org/wp-rss.php rather than http://www.goesping.org/feed. There’s a bug about this: http://trac.wordpress.org/ticket/6460 but applying the patch didn’t actually fix it, at least not yet…
Stupid wordpress.
UPDATE: fixed. Had to regenerate the .htaccess file.