fbwidthFix.js

if($.browser.webkit) {
         FB.Canvas.setSize =  function(params) {
           if (typeof params != "object") {
             params = {};
           }
           params = FB.copy(params || {}, FB.Canvas._computeContentSize());

           // Deep compare
           if (FB.Canvas._lastSize &&
               FB.Canvas._lastSize.width == params.width &&
               FB.Canvas._lastSize.height == params.height) {
             return false;
           }
           FB.Canvas._lastSize = params;

           // Previously a FB.Canvas._sendMessageToFacebook() call
           FB.Arbiter.inform('setSize', {height: params.height});
           return true;
         };
       }
       FB.Canvas.setAutoResize();