[Samba] Samba 3.0 + Active Directory + Debian + Profiles?

[Jan Johansson]

How on earth do i make Debian/Unstable play nice and use Samba 3.0 as a
member server in a AD-Domain running in Native Mode, and be able to
store user profiles on the Samba server? I just can make no heads nor
tails from any documentation, have I missed something fundamental?
Adding the server to the domain was easy enough. But then user
authentication does not seem to work?