Problem with initConfig and Ext.override

[mentax.pl]

What is wrong with this example:
http://jsfiddle.net/BGMYL/ ?
(Uncaught TypeError: Cannot read property 'initialized' of undefined)

Without overriding this example work correct, but in SA2 is impossible to define config property.

How I can do it?

[el_chief]

why are you doing it that way?

[mentax.pl]

Code in this example is simplified special to show this problem.

SA2 - Sencha Architect 2 - but I don't think that it is only Architect problem.