[Samba] Samba fails after upgrade

[Kryol]

I have Samba server joined to NT domain.
My previous version was 3.0.12. It worked fine.
But after upgrade to 3.0.22 (FreeBSD 5.3) smbd fails during startup.
I see following messages at /var/log/messages:

May 22 08:46:07 ws170101 smbd[537]: [2006/05/22 08:46:07, 0] smbd/server.c:main(829)
May 22 08:46:07 ws170101 smbd[537]:   ERROR: failed to setup guest info.
May 22 08:46:08 ws170101 winbindd[544]: [2006/05/22 08:46:08, 0] 
rpc_client/cli_pipe.c:cli_rpc_pipe_open_noauth(2240)
May 22 08:46:08 ws170101 winbindd[544]:   cli_rpc_pipe_open_noauth: rpc_pipe_bind for pipe \lsarpc failed with error 
NT_STATUS_BUFFER_TOO_SMALL

Also I found at /var/log/samba/smbd.log:
[2006/05/22 08:46:07, 1] auth/auth_util.c:make_server_info_sam(876)
  User abc in passdb, but getpwnam() fails!
[2006/05/22 08:46:07, 0] smbd/server.c:main(829)
  ERROR: failed to setup guest info.

I did not change any Samba configuration file after upgrade.
Do I need to rejoin into domain?