Ok just came across this feature on facebook by reading a sophos articles

Very importantIf you play fb games forget that,as every time you will enter a game,fb will ask you if you want to go on as normal http.
The https seams to work only on fb and not with game and apps,but it still add a very good protection to your account personal info.
So here is the articles link.
How to enable HTTPS/SSL encryption to secure your Facebook account
Click the video to see how to,its very simple and fb will be as secure as your bank account website with a https address
