title: Facebook apprequest not being sent to facebook users
body: <p>I'm developing a web app integrated with facebook and I'm using the request dialog to invite new users. So a user of my app can click on a button to send an apprequest to some of his facebook friends which are not users yet.</p>
  
  <pre><code>exports = fm.namespace(this,'bla','facebook')
  
  exports['init'] = function(){
    window.fbAsyncInit = function() {
      if (undefined !=RAILS_ENV['facebook_app_id'])
      {FB.init({
                 appId      : RAILS_ENV['facebook_app_id'], // App ID
        status     : true, // check login status
        cookie     : true, // enable cookies to allow the server to access the session
        oauth      : true, // enable OAuth 2.0
        xfbml      : true  // parse XFBML
               });}
    };
  
    // Load the SDK Asynchronously
    (function(d){
      var js, id = 'facebook-jssdk'; if (d.getElementById(id)) {return;}
      js = d.createElement('script'); js.id = id; js.async = true;
      js.src = "//connect.facebook.net/en_US/all.js";
      d.getElementsByTagName('head')[0].appendChild(js);
    }(document));
  }
  exports['sendRequestToOneRecipient']= function (uid) {
    FB.ui({method: 'apprequests',
      message: "bla bla",
      to: uid 
    }, requestCallback);
  
    function requestCallback(response) {
      if (response &amp;&amp; response.to) {
        console.log("Message was sended"); 
      } else {
        console.log("Message was not sended.");
      }
    }
  }
  </code></pre>
  
  <p>As far as I know it does not requiere any permissions because is a explicit action from the user. 
  When a user clicks the button, the facebook window appears and everything is working fine. The callback is sending back the appId and the userid of the destinatary but the message is never being notifified in facebook destinatary account</p>
  
  <p>No javascript errors on the console</p>
  
  <p>Similary I'm posting to the wall of facebook friends and it is working without any issues. The same code but instead of 'apprequest', the method is 'feed'</p>