When I used it on the following conditions, an error is given.

1. load ext-debug.js or ext.js
2. Ext.Loader is enabled.
3. Ext.create('Ext.panel.Panel', {.....});

TestBrowser is Chrome(22.0.1229.94)

XMLHttpRequest cannot load http://cdn.sencha.io/ext-4.1.1a-gpl/src/panel/Panel.js?_dc=1351779146022. Origin http://localhost is not allowed by Access-Control-Allow-Origin.
Chrome is need 'Access-Control-Allow-Origin' header.
because, cdn.sencha.io need send this header.

so, for ex.

'Access-Control-Allow-Origin: *'

Because it is a problem of the policy, please examine it.

thank you.