[Samba] failed to set machine spn: Operations error

[rajat swarup]

I have samba, winbind, kerberos installed on an ubuntu server.  I have
a windows server 2003 based domain.  when i try to execute the
following command:
net ads join -U user
I get the following error:
Failed to join domain: failed to set machine spn: Operations error

Kerberos authentication works fine and I can get the kerberos ticket
just fine. This setup was working fine earlier.  I was able to
authenticate to the windows server
This started happening when I upgraded the samba version using aptitude.

Can any one point me in the right direction as to what's happening?

Thanks,
Rajat.
www.rajatswarup.com