[Samba] Samba 4 GA upgrade - auth failing

[Kristofer]

Hello,

I upgraded from Samba 4 RC4 to GA, and now authentication from CentOS 6.3 winbind clients are failing:

Dec 12 23:56:37 host1 net: [2012/12/12 23:56:37.842299,  0] libads/kerberos.c:333(ads_kinit_password)
Dec 12 23:56:37 host1 net:   kerberos_kinit_password HOST1$@AD.DOMAIN.COM failed: Preauthentication failed

What does this mean, and how can I fix?  All beta > RC upgrades worked without an issue.