Hello all, This is my first Ubuntu install (v5.10) and first time administering a linux system, though I've been a *nix user for many years. My install went absolutely peachy and everything configured properly on the first go. Today I setup Kerberos v.5, Samba & Winbind in order to share files to users in a Windows 2003 Server domain. That went fine and I acquired a lease (kinit) from the domain server fine. I had to leave my desk for a moment so I locked my screen ... and now it's rejecting my password. Anyone have any thoughts on this? I know I can reset the password through grub, but I'd prefer to understand why this has happened and how I can prevent the problem. Thanks in advance for any help. Cheers, Pete.