cannot rename windows xp machine in samba4

[Vladimir Obukhov]

Hello,
I've installed samba4 as domain controller on ubuntu 12.04 LTS
package versions:

samba4                            4.0.0~alpha18.dfsg1-4ubuntu2
bind9                            1:9.8.1.dfsg.P1-4
I've tuned apparmor so that there are no 'denied' messages on the logs (it
allows bind to rw to needed dirs and mmap needed modules)

both machines (ubuntu and win xp) are vmware virt machines

hostnames: ubuntu and ws1

ip address of the ubuntu server is 192.168.99.1
ip address of the windows xp machine 192.168.99.101
I used this howto for my setup
http://wiki.samba.org/index.php/Samba4/HOWTO

here are my provision script parameters:

/usr/share/samba/setup/provision --realm=fsd.local --domain=FSD
--adminpass=2UjM4kVeWC --server-role='domain controller'
here is my smb.conf

# Global parameters
[global]
        server role = domain controller
        workgroup = FSD
        realm = fsd.local
        netbios name = UBUNTU
        passdb backend = samba4
        log level = all:5
[netlogon]
        path = /var/lib/samba/sysvol/fsd.local/scripts
        read only = No
[sysvol]
        path = /var/lib/samba/sysvol
        read only = No
log level is 5, I tried to make it 10, too much logs. But never the less I
have level 10 logs and I was able to find error in it, thought the error
also appear at log level 5.

samba4 and bind9 are up and running
I've joined winxp to samba4 domain just fine, added test user (using
dsa.msc, everything was smooth) and logged in just fine
then I've tried to rename windows xp (my computer right mouse, computer
name, change)
and here's where I stuck
I've made a little research and here are my results, sorry if they are a
bit clumsy, I'm doing this for the first time

after I've joined winxp 'ws1' samba4 domain here's ldbsearch:

ldbsearch -H /var/lib/samba/private/sam.ldb.d/DC\=FSD\,DC\=LOCAL.ldb cn=ws1

# record 1
dn: CN=WS1,CN=Computers,DC=fsd,DC=local
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: user
objectClass: computer
cn: WS1
instanceType: 4
whenCreated: 20120429072823.0Z
uSNCreated: 3723
nTSecurityDescriptor:
   [skipped]  IF THIS MATTERS I CAN DO FRESH INSTALL AND COPYPASTE
name: WS1
objectGUID: 535ca94f-a62f-4966-8c96-513c6059956c
badPwdCount: 0
codePage: 0
countryCode: 0
badPasswordTime: 0
lastLogoff: 0
lastLogon: 0
objectSid: S-1-5-21-319135572-3476560769-115919443-1104
accountExpires: 9223372036854775807
logonCount: 0
sAMAccountName: WS1$
objectCategory:
<GUID=0370df20-8e21-4077-bd8a-8e5da630da45>;CN=Computer,CN=Sch
 ema,CN=Configuration,DC=fsd,DC=local
sAMAccountType: 805306369
isCriticalSystemObject: FALSE
primaryGroupID: 515
unicodePwd:: B8/uLgVr57O6hx4uf3Hn8w==
ntPwdHistory:: B8/uLgVr57O6hx4uf3Hn8w==
supplementalCredentials::
AAAAAOQFAAAAAAAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAg
   [skipped] IF THIS MATTERS I CAN DO FRESH INSTALL AND COPYPASTE
pwdLastSet: 129801581030000000
displayName: WS1$
userAccountControl: 4096
dNSHostName: ws1.fsd.local
servicePrincipalName: HOST/ws1.fsd.local
servicePrincipalName: HOST/WS1
operatingSystem: Windows XP Professional
operatingSystemServicePack: Service Pack 3
operatingSystemVersion: 5.1 (2600)
replPropertyMetaData::
AQAAAAAAAAAcAAAAAAAAAAAAAAABAAAAl36tBQMAAABIl4kYEwnrT71
  [skipped] IF THIS MATTERS I CAN DO FRESH INSTALL AND COPYPASTE
whenChanged: 20120429072827.0Z
uSNChanged: 3728
distinguishedName: CN=WS1,CN=Computers,DC=fsd,DC=local
then I try to rename 'ws1' to 'ws2' as I described above, I got the the
error saying
"cannot create file because it exists already" (I've got the error in
russian so I've translated it)

here what I got in /var/log/samba/samba.log

again
ldbsearch -H /var/lib/samba/private/sam.ldb.d/DC\=FSD\,DC\=LOCAL.ldb cn=ws1

# record 1
dn: CN=WS1,CN=Computers,DC=fsd,DC=local
objectClass: top
objectClass: person
objectClass: organizationalPerson
objectClass: user
objectClass: computer
cn: WS1
instanceType: 4
whenCreated: 20120429072823.0Z
uSNCreated: 3723
nTSecurityDescriptor:
O:S-1-5-21-319135572-3476560769-115919443-512G:S-1-5-21-
    [skipped] IF THIS MATTERS I CAN DO FRESH INSTALL AND COPYPASTE
name: WS1
objectGUID: 535ca94f-a62f-4966-8c96-513c6059956c
badPwdCount: 0
codePage: 0
countryCode: 0
badPasswordTime: 0
lastLogoff: 0
lastLogon: 0
objectSid: S-1-5-21-319135572-3476560769-115919443-1104
accountExpires: 9223372036854775807
logonCount: 0
objectCategory:
<GUID=0370df20-8e21-4077-bd8a-8e5da630da45>;CN=Computer,CN=Sch
 ema,CN=Configuration,DC=fsd,DC=local
sAMAccountType: 805306369
isCriticalSystemObject: FALSE
primaryGroupID: 515
unicodePwd:: B8/uLgVr57O6hx4uf3Hn8w==
ntPwdHistory:: B8/uLgVr57O6hx4uf3Hn8w==
supplementalCredentials::
AAAAAOQFAAAAAAAAIAAgACAAIAAgACAAIAAgACAAIAAgACAAIAAg
   [skipped] IF THIS MATTERS I CAN DO FRESH INSTALL AND COPYPASTE
pwdLastSet: 129801581030000000
userAccountControl: 4096
dNSHostName: ws1.fsd.local
operatingSystem: Windows XP Professional
operatingSystemServicePack: Service Pack 3
operatingSystemVersion: 5.1 (2600)
sAMAccountName: WS2$
servicePrincipalName: HOST/ws1.fsd.local
servicePrincipalName: HOST/WS2
whenChanged: 20120429073855.0Z
displayName: WS2$
replPropertyMetaData::
AQAAAAAAAAAcAAAAAAAAAAAAAAABAAAAl36tBQMAAABIl4kYEwnrT71
    [skipped] IF THIS MATTERS I CAN DO FRESH INSTALL AND COPYPASTE
uSNChanged: 3733
distinguishedName: CN=WS1,CN=Computers,DC=fsd,DC=local
It seems samba4 tried to change the name and then something crashed
I've run samba_dnsupdate --verbose and got "No DNS updates needed"

I can post /var/log/samba/samba.log somewhere if needed, but it's rather
huge.

What am I doing wrong? Please help, thanks