[ExtJS 4.1.1] Ext.require does not call callback if provided

[BillHubbard]

If I pass a callback fn to Ext.require, it never gets called. For example, Ext.require('Sjs.apps.examples.reference.Main', function() { console.log('loaded'); });

This problem appeared in 4.1.0 and is critical to the proper functioning of our environment. This is blocking us from upgrading from 4.0.7.