manually configured interfaces ?

[Niall Parker <stuff pender dnsalias net>]

Hello,

I'd like to retain network-manager for my wifi and 3G connections but 
dedicate the wired connection to a static connection, dedicated private 
subnet. From reading various doc's I understood that including 
configuration in /etc/networking/interfaces would be sufficient for 
network-manager to leave it alone, but after working for a bit it 
disappears. Is there some other config needed to make it manual ?

Using Ubuntu 10.10, standard network-manager package from repos, 0.8.1

Thanks.

				... Niall