From the 1st October 2011 FaceBook requires all Apps, elements and page tabs to use SSL so they can be accessed via https.

If your App or Page Tab does not use SSL then you are at risk of having it disabled. You can purchase a RapidSSL for as little as $10 a…

Since my last post, the effects of the recent DigiNotar breach have spread across the security industry. Many media outlets recently shared some of the names of the 531 fraudulent certificates created, including Google, Facebook, Skype, Microsoft, as well as each of the major…

via eweek.com