samba - Aug 2012 - Problems connecting win7 client to new Samba PDC

Hey, I'm running the latest Ubuntu 12.04 Samba 3.6.3, I just want a 
simple PDC for authentication.  Client is win7 32 bit with latest 
updates.  The client can join the domain, but I can't log in with any 
users, it gives me "The User Profile Service service failed the logon.  
User profile cannot be loaded."  Looking at the log, I've found this:

"[2012/08/08 17:08:39.747592,  0] 
rpc_server/netlogon/srv_netlog_nt.c:976(_netr_ServerAuthenticate3)
   _netr_ServerAuthenticate3: netlogon_creds_server_check failed. 
Rejecting auth request from client CLIENTPC machine account CLIENTPC$"

Any ideas on what the problem is?

Here's some more information on my problem:

smb.conf:
--- begin smb.conf ---
[global]
         workgroup = MYWORKGROUP
         server string = %h server (Samba, Ubuntu)
         map to guest = Bad User
         obey pam restrictions = Yes
         pam password change = Yes
         passwd program = /usr/bin/passwd %u
         passwd chat = *Enter\snew\s*\spassword:* %n\n 
*Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
         unix password sync = Yes
         syslog = 0
         log file = /var/log/samba/log.%m
         max log size = 1000
         add machine script = /usr/sbin/useradd -g machines -c "%u 
machine account" -d /var/lib/samba -s /bin/false %u
         logon script = logon.cmd
         logon path          logon home          domain logons = Yes
         dns proxy = No
         usershare allow guests = Yes
         panic action = /usr/share/samba/panic-action %d
         idmap config * : backend = tdb

[homes]
         comment = Home Directories
         valid users = %S
         read only = No
         create mask = 0700
         directory mask = 0700
         browseable = No

[netlogon]
         comment = Network Logon Service
         path = /srv/samba/netlogon
         guest ok = Yes

[printers]
         comment = All Printers
         path = /var/spool/samba
         create mask = 0700
         printable = Yes
         print ok = Yes
         browseable = No

[print$]
         comment = Printer Drivers
         path = /var/lib/samba/printers
--- end smb.conf ---

Here's the pdbedit -Lv spitout for my user:

--- begin output---
Unix username:        myadmin
NT username:
Account Flags:        [U          ]
User SID:             S-1-5-21-2762049607-2166809996-183419993-1000
Primary Group SID:    S-1-5-21-2762049607-2166809996-183419993-513
Full Name:
Home Directory:
HomeDir Drive:
Logon Script:         logon.cmd
Profile Path:
Domain:               MYWORKGROUP
Account desc:
Workstations:
Munged dial:
Logon time:           0
Logoff time:          Wed, 06 Feb 2036 10:06:39 EST
Kickoff time:         Wed, 06 Feb 2036 10:06:39 EST
Password last set:    Wed, 08 Aug 2012 17:54:50 EDT
Password can change:  Wed, 08 Aug 2012 17:54:50 EDT
Password must change: never
Last bad password   : 0
Bad password count  : 0
Logon hours         : FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
--- end output ---