title: Incomplete results retrieving birthdays using Facebook JavaScript API
body: <p>I'm trying to retrieve all the birthdays of a user friends using Facebook's Javascript API, however I'm getting incomplete results: some birthdays are fetched while others are not. And some of those which are not retrieved have their birthday on their facebook page. I have all the permissions necessary. Am I missing something?</p>
  
  <p>The code I'm using just in case:</p>
  
  <pre><code>FB.api('/me/friends?fields=id,birthday', function(response) { console.log(response) }); 
  </code></pre>
  
  <p>Thanks.</p>