This seems to be a mistake. Here is a link to official reliable sources:
http://developers.facebook.com/bugs/310763168934515
And my jsFiddle is here to demonstrate: http://jsfiddle.net/dmcs/3D2GD/1/
EDIT
I have found a solution!
At first I put my code in my own domain, not jsFiddle, in order to test better, however my first attempt failed, as if the code was still on jsFiddle. Therefore, I am more worried about the situation.
Then, to configure the application that I specified, I went in and pointed the WebSite url to https://developers.facebook.com/apps/{APP_ID}/summary
Here is my code
<html> <head> <title>Like Box example</title> </head> <body> <div id="fb-root"></div> <script> window.fbAsyncInit = function() { FB.init({ appId: '{APP_ID}' }); FB.Event.subscribe('edge.create', function(response) { alert('You liked the URL: ' + response); }); }; (function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; </script> <div class="fb-like-box" data-href="http://www.facebook.com/Cocacola" data-width="292" data-show-faces="true" data-stream="true" data-header="true"></div> </body> </html>
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