Our office is a mix of XP and NT4 clients. I've been running Fedora Core 3 for some time with samba-3.0.10-1.fc3.i386.rpm with no problems. When I upgraded to Fedora Core 4 with samba-3.0.14a-2.i386.rpm NT4 clients can no longer authenticate. [2006/02/08 14:17:22, 5] auth/auth.c:check_ntlm_password(271) check_ntlm_password: unix authentication for user [zzz] FAILED with error NT_STATUS_WRONG_PASSWORD If I map using a XP client with the same user all is well. I hope this is just a config setting that has changed. I also tried samba-3.0.21b-3.i386.rpm from samba.org and it failed as well. Thanks Richard