title: FB init function gives wrong version error
body: <p>I'm using the Facebook JS sdk, and I have created a new App today.
  Everything is configured properly.
  Using init function like:</p>
  
  <pre><code>window.fbAsyncInit = function() {
      FB.init({
        appId      : 'xxxx', // App ID
        status     : false, 
        version:  'v2.0',
        cookie     : true, 
        xfbml      : false  // parse XFBML
      });
  };
  
      (function(d, s, id){
           var js, fjs = d.getElementsByTagName(s)[0];
           if (d.getElementById(id)) {return;}
           js = d.createElement(s); js.id = id;
           js.src = "//connect.facebook.net/pl_PL/sdk.js";
           fjs.parentNode.insertBefore(js, fjs);
         }(document, 'script', 'facebook-jssdk'));
  </code></pre>
  
  <p>but I have an error:
  "Uncaught Error: init not called with valid version "
  Was trying also other versions like: 2.1, 2.2 and still no luck.
  What am I doing wrong here?</p>