samba4 and vista SP1 member

[Stephen Roylance]

I upgraded my vista system to SP1 and it seems my domain membership with 
samba4 has broken.  I unjoined the system from the domain and am unable 
to rejoin.
I have debug level 5 logs from the time around the rejoin, the only 
indications of failure I see are a few instances of these two lines:
Kerberos: Failed to decrypt enc-authorization-data
Kerberos: Failed parsing TGS-REQ from 192.168.0.100

Any advice appreciated.
-Steve