scrollbars.js

window.fbAsyncInit = function() {
  FB.init({
    appId      : 'xxx', // App ID
    channelUrl : 'channel.html', // Channel File
    status     : true, // check login status
    cookie     : true, // enable cookies to allow the server to access the session
    xfbml      : true  // parse XFBML
  });

  // Remove those pesky scrollbars
  FB.Canvas.setAutoGrow(true);
};