Not able to load classes defined in archive file in Mac OSX using Object.factory

[Adam D. Ruppe]

PS object.factory sucks and I hope it is removed some day. 
There's no plan to do so, but I still wouldn't actually rely on 
it... instead, I'd write your own factory function and 
registration system, so you control it and will have reliability 
to your specific needs.

but still if the factory works for you, eh, you can use it.