NetworkManager breaks macchanger

[Derek Frye <frye0031 umn edu>]

Using NetworkManager I'm unable to use macchanger 
(www.alobbs.com/macchanger/) to change my mac address. Does anyone know 
why this is?

Steps to reproduce:
On Ubuntu Breezy (though I suspect all distributions suffer from 
similar), package from http://bootlab.org/~j/NetworkManager-breezy/.

1. Connect to a network with NetworkManager
2. $ sudo macchanger -A eth1
3. macchanger reports a successful mac address change, NetworkManager 
senses the interface is down, then reloads the interface using the old 
MAC address.

Where is NetworkManager getting the mac address from? Does it store it 
known addresses somewhere?

Thanks!

--Derek