this is real - Facebook can track you as you visit each site with a like button whether you click the like or not, and whether you are logged in or not (if they choose to set a cookie for anonymous users).<p>But its not new. Its just noticed since FB started migrating some certs this last week<p>They've been snagging your history as you move around 'likeable' pages since the start.<p>Private browsing sessions and deleting cookies will obviously zap this.