Fb: Insecure JavaScript attempt to access frame with url

Any idea why I am still getting the error Unsafe JavaScript attempt to access frame with URL http://homodigitalis.org/ from frame with URL

on homodigitalis.org even though I followed Facebook's recommendations ?

window.fbAsyncInit = function(){

    // init the FB JS SDK
    FB.init({
        appId: '155692864582714',
        channelUrl: 'http://homodigitalis.org/channel.html',
        status: true,
        xfbml: true
    });

};

(function() {
    var e = document.createElement('script'); e.async = true;
    e.src = document.location.protocol +
    '//connect.facebook.net/en_US/all.js';
    document.getElementById('fb-root').appendChild(e);
}());