Managed service account password sync issue

You create a managed service account in a domain.
•You install the managed service account on a computer that is running Windows 7 or Windows Server 2008 R2.
•You configure a service to use the managed service account on the computer.

This issue occurs because the Kerberos and NTLM security providers are not notified when the password of the managed service account is changed.

http://support.microsoft.com/kb/2494158