can't browse PDC

[Torsten Curdt]

We've set up Samba as PDC and for some reasons
some users can't browse the for the shares anymore!
(Worked fine for more than 2 months!)
"windows alert: \\KURN\ not available, access denied"

Any automatic reconnected net volumes work fine.

There's nothing strange in the log file (except
"call_nt_transact_ioctl: Currently not implemented"
but that was there before)

Another strange behavior: When I then log in as
an account that can access KURN I can see
the homes share of the user that tried before
but was not able to connect! Although I cannot
connect to this share "Access denied"

I don't know what I have changed! Here's my
global section:

[global]
#time server = yes
keep alive = 30
log file = /var/log/smbd.log
lock directory = /var/lock/samba
#syslog only = yes
#deadtime = 1

bind interfaces only = yes
interfaces = eth0
interfaces = 172.16.1.2/255.255.0.0
allow hosts = 172.16.

workgroup = dff
security = user
#netbios name = PDCSAMBA
server string = Linux PDC Samba %v
preferred master = yes
domain logons = yes
guest account = samba
#lm announce = no
domain master = yes
logon path = \\%L\Profiles\%U
logon drive = P:
; logon script = login.bat

#unix password sync = yes
unix realname = yes
null passwords = yes
map to guest = Bad User
encrypt passwords = yes
#passwd chat debug = yes
# wins server = 192.168.1.1
# wins support = yes

printing = bsd
printcap name = /etc/printcap.smb