[Samba] Domain login - XP 64 -> Samba

[Brian Ruth]

I currently have samba setup as a file/login server. A variety of 
clients running Windows 2000 and XP 32-bit authenticate normally without 
any issues. I just brought up a Windows XP 64-bit box made the standard 
group policy changes and joined the domain without any issues. When 
attempting to login against the domain Windows returns "A remote 
procedure call (RPC) protocol error occurred".

The samba log for the client appears to indicate that the credentials 
were correct. I have tried both versions 3.0.14a and 
3.0.20pre1-SVN-build-766 with the exact same results.

The output from testparm:
Load smb config files from /usr/local/etc/smb.conf
Processing section "[homes]"
Processing section "[netlogon]"
Processing section "[mp3s]"
Processing section "[world]"
Processing section "[wwwroot]"
Processing section "[apps]"
Processing section "[mame]"
Processing section "[media]"
Processing section "[backup]"
Server's Role (logon server) NOT ADVISED with domain-level security
Loaded services file OK.
Server role: ROLE_DOMAIN_BDC
Press enter to see a dump of your service definitions
[global]
	workgroup = HOME
	interfaces = xl0
	security = DOMAIN
	log file = /var/log/samba/log.%m
	time server = Yes
	logon script = logon.bat
	logon drive = u:
	logon home = \\panther\%U
	domain logons = Yes
	os level = 65
	preferred master = Yes
	domain master = Yes
	wins support = Yes
	invalid users = bin, daemon, sys, man, mail, ftp, alias, qmaill, 
qmaild, qmailp, qmailq, qmailr, qmails, sshd, bind, uucp
	admin users = @wheel

[homes]
	read only = No
	create mask = 0600
	directory mask = 0700

[netlogon]
	path = /export/home/samba/netlogon
	admin users = brian
	browseable = No

[world]
	comment = Misc Share
	path = /world
	valid users = @samba
	read only = No

[apps]
	comment = Applications
	path = /storage01/apps
	valid users = @samba
	read only = No

[media]
	comment = Media Share
	path = /storage01/media
	valid users = @samba
	read only = No

[backup]
	comment = PC Backups
	path = /storage01/pc.backup
	valid users = @staff
	read only = No

It's interesting that the box can join the domain and successfully 
connect to network shares - it just fails to authenticate. I'm probably 
missing something obvious but a search of the list archives and the web 
didn't produce any solutions.

Thanks,
Brian