[Samba] Password will expire in 12 days?

[Simon Leung]

Dear All,
 
I have just upgraded my system to 3.0.2 with ldap as the backend. I've found one weird thing after the upgrade is that users are prompted that their passwords will be expired in 12 days as this "12 days" never descending to 11..10..! 
I didn't set any password expiry date to my users before the upgrade......and here is one of the account info from my db:
 
PS. this account info is exactly the same as before the upgrade.
 
 
# user, Users, localhost.localdomain
dn: uid=user,ou=Users,dc=localhost,dc=localdomain
objectClass: top
objectClass: inetOrgPerson
objectClass: posixAccount
objectClass: sambaSAMAccount
cn: labguest
sn: labguest
uid: labguest
uidNumber: 1058
gidNumber: 513
homeDirectory: /user
loginShell: /bin/false
gecos: System User
description: System User
sambaLogonTime: 0
sambaLogoffTime: 2147483647
sambaKickoffTime: 2147483647
sambaPwdCanChange: 0
displayName: System User
sambaSID: S-1-5-21-3560070872-2796102831-4012217845-3116
sambaLMPassword: 9A8027BFFBF554F3417EAF50CFAC29C3
sambaAcctFlags: [U]
sambaNTPassword: 317B01BD180336816A20CF188BEBD7E4
sambaPwdLastSet: 1073635798
sambaPwdMustChange: 1077523798
userPassword:: e1NTSEF9UTJIZXIxU3Znam5XYXgxK0NaWkhyTXVLWEZGbzZKclk=
 
 
Many Thx and appreciate for any hints
 
 
Simon