[Samba] Samba File Permission problem after updating.. samba-3.0.20b-2 please help

[updatemyself .]

Hai All,

I am Unable set permission from Windows
after i update..samba-3.0.14a-1 to samba-3.0.20b-2
the thing is.. it list my all Domain users and groups
only in capital letters...

Setup is...
Windows 2003 as ADS and samba as file server...
i have 6TB volumes... my samba server is
authenticating to Windows 2003 ADS...

but now even as domain Administrator i cant reset..
permission of some file....
[no doubt the ownership for the file is..
with Domain Administrator....]

i have 2 samba servers.. one is still old version...
its still working fine....

in both i am getting different result.. while i execute.
wbinfo -u....
in new version all user name in capital
in old version all user name in small letter

why all this happen....?

but "getent passwd" giving me correct result.....
in both machine giving same result....


Here is my smb.conf file configuration...

#=========================== Global Settings
================================
[global]

   workgroup = MYDOMAIN
   server string = Samba Server
   log file = /var/log/samba/%m.log
   max log size = 50
   security = ads
   encrypt passwords = yes
   socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
   dns proxy = no


#=========================== Share Definitions
==============================
   #ldap idmap suffix = ou=emplist,dc=dqe,dc=com
   password server = 172.16.20.200
   realm = MYDOMAIN.COM
   idmap uid = 16777216-33554431
   idmap gid = 16777216-33554431
   template shell = /bin/bash
   template homedir = /home/%D/%U
   allow trusted domains = no
   idmap backend = idmap_rid:DQE=16777216-33554431
   winbind use default domain = yes


[vol7]
   path = /vol07_1000
   writable = yes
   valid users = @16777729
   inherit owner = yes
   inherit permissions = yes
   inherit acls = yes
   nt acl support = yes
   create mask = 0644
   directory mask = 0775
   security mask = 0755
   force security mode = 0000
   directory security mask = 0777
   force directory security mode = 0000


=============================================================================
Please Share Your knowledge to solve this problem...

Thank You in Advance,

Regards,
Jerrynikki.