[Samba] Vista, 35 second login delay, domain only.

[michael at estone.ca]

Hello,

I've spent time trying to find an answer to this one, but no luck.
The main problem is that when any user logs into Vista with a domain  
account, there will be ~35 second delay where the system just sits at  
the welcome screen with the spinning circle. (after typing their  
password)

This happens on Vista sp1, and earlier. Also on Samba 3.0.24, 3.0.28 and 3.2.
I'm pretty sure the DNS is okay, as everything else seems fine. Even  
XP machines login normally.
Regardless of profiles being roaming or local, the delay is still there.
tcpdump shows no activity during this delay.
I've tried removing all traces of ipv6, from both the server and the client.
All firewalls are off on both server and client.
I'm pretty sure its Vista thats doing something, but just have no clue  
where to look.
Local accounts login within a few seconds, and the domain logins are  
almost bareable at about 35 seconds, but really quite annoying. :(

I'm curious to know if anyone else experiences this or not?

Thanks!
Mike