[Samba] logins fine, then not: NT_STATUS_WRONG_PASSWORD

[Christian Walther]

Did you or someone else install any patches/upgrades/service packs on
the client machines? We had an issue with users not being able to
login at one of our clients, until we figured out that the machine
used NTLM-V2 authentication, wich wasn't supported by our domain.
There's a registry key that changes the clients behaviour, you might
want to google for this issue, I remember that there's a nice PDF
somewhere.