Error: Feed failed! Causes may be (1) No data found for RSS feed http://facebook.com/share/p/4MDRD3qUN3hjfh3F/?mibextid=xfxF2i; (2) There are no items are available for this feed; (3) The RSS feed does not validate.

Please verify that the URL http://facebook.com/share/p/4MDRD3qUN3hjfh3F/?mibextid=xfxF2i works first in your browser and that the feed passes a validator test.