3つのローカルエリア（それぞれrouterを経由しています）でそれぞれにファイルサーバとしてsambaマシン
を稼動させて、Active Directoryに参加しています。

ローカルエリアをそれぞれA,B,Cと仮定して

AとBにはドメインコントローラ(Win)が存在しており、
Cはドメインコントローラー,WINSが存在しておりません。

A,Bで稼動しているsambaは問題ありませんが、
Cのsambaでは、不定期ではありますが、panicを起こしてサービスがとまります。

何か設定は不味いのでしょうか？
アドバイス御願い致します。

OS:ubuntu 8.04 LTS server x86_64
samba:3.0.28a-1ubuntu4.5

[daemon.log](panic抜粋)

Jun 10 11:00:16 aswan nss_wins[19340]: [2009/06/10 11:00:16, 0] lib/fault.c:fault_report(41)
Jun 10 11:00:16 aswan nss_wins[19340]:   ===============================================================
Jun 10 11:00:16 aswan nss_wins[19340]: [2009/06/10 11:00:16, 0] lib/fault.c:fault_report(42)
Jun 10 11:00:16 aswan nss_wins[19340]:   INTERNAL ERROR: Signal 6 in pid 19340 (3.0.28a)
Jun 10 11:00:16 aswan nss_wins[19340]:   Please read the Trouble-Shooting section of the Samba3-HOWTO
Jun 10 11:00:16 aswan nss_wins[19340]: [2009/06/10 11:00:16, 0] lib/fault.c:fault_report(44)
Jun 10 11:00:16 aswan nss_wins[19340]:
Jun 10 11:00:16 aswan nss_wins[19340]:   From: http://www.samba.org/samba/docs/Samba3-HOWTO.pdf
Jun 10 11:00:16 aswan nss_wins[19340]: [2009/06/10 11:00:16, 0] lib/fault.c:fault_report(45)
Jun 10 11:00:16 aswan nss_wins[19340]:   ===============================================================
Jun 10 11:00:16 aswan nss_wins[19340]: [2009/06/10 11:00:16, 0] lib/util.c:smb_panic(1633)
Jun 10 11:00:16 aswan nss_wins[19340]:   PANIC (pid 19340): internal error
Jun 10 11:00:16 aswan nss_wins[19340]: [2009/06/10 11:00:16, 0] lib/util.c:log_stack_trace(1737)
Jun 10 11:00:16 aswan nss_wins[19340]:   BACKTRACE: 22 stack frames:
Jun 10 11:00:16 aswan nss_wins[19340]:    #0 /usr/sbin/winbindd(log_stack_trace+0x1c) [0x4d4a3c]
Jun 10 11:00:16 aswan nss_wins[19340]:    #1 /usr/sbin/winbindd(smb_panic+0x43) [0x4d4b23]
Jun 10 11:00:16 aswan nss_wins[19340]:    #2 /usr/sbin/winbindd [0x4c2552]
Jun 10 11:00:16 aswan nss_wins[19340]:    #3 /lib/libc.so.6 [0x7fec196dd100]
Jun 10 11:00:16 aswan nss_wins[19340]:    #4 /lib/libc.so.6(gsignal+0x35) [0x7fec196dd095]
Jun 10 11:00:16 aswan nss_wins[19340]:    #5 /lib/libc.so.6(abort+0x110) [0x7fec196deaf0]
Jun 10 11:00:16 aswan nss_wins[19340]:    #6 /lib/libc.so.6(__assert_fail+0xef) [0x7fec196d62df]
Jun 10 11:00:16 aswan nss_wins[19340]:    #7 /usr/lib/libldap_r-2.4.so.2(ldap_parse_result+0x423) [0x7fec19c2cdb3]
Jun 10 11:00:16 aswan nss_wins[19340]:    #8 /usr/sbin/winbindd [0x5c3a19]
Jun 10 11:00:16 aswan nss_wins[19340]:    #9 /usr/sbin/winbindd(ads_do_search_all_args+0x83) [0x5c3da3]
Jun 10 11:00:16 aswan nss_wins[19340]:    #10 /usr/sbin/winbindd [0x5cc6ec]
Jun 10 11:00:16 aswan nss_wins[19340]:    #11 /usr/sbin/winbindd(ads_do_search_retry+0x10) [0x5ccb70]
Jun 10 11:00:16 aswan nss_wins[19340]:    #12 /usr/sbin/winbindd(ads_search_retry+0x21) [0x5cccd1]
Jun 10 11:00:16 aswan nss_wins[19340]:    #13 /usr/sbin/winbindd [0x47434a]
Jun 10 11:00:16 aswan nss_wins[19340]:    #14 /usr/sbin/winbindd [0x45d0e6]
Jun 10 11:00:16 aswan nss_wins[19340]:    #15 /usr/sbin/winbindd(winbindd_dual_userinfo+0x17b) [0x4527ab]
Jun 10 11:00:16 aswan nss_wins[19340]:    #16 /usr/sbin/winbindd [0x4770d2]
Jun 10 11:00:16 aswan nss_wins[19340]:    #17 /usr/sbin/winbindd(init_child_connection+0x15b) [0x45887b]
Jun 10 11:00:16 aswan nss_wins[19340]:    #18 /usr/sbin/winbindd(rescan_trusted_domains+0xf9) [0x458de9]
Jun 10 11:00:16 aswan nss_wins[19340]:    #19 /usr/sbin/winbindd(main+0x6a8) [0x44fd98]
Jun 10 11:00:16 aswan nss_wins[19340]:    #20 /lib/libc.so.6(__libc_start_main+0xf4) [0x7fec196c91c4]
Jun 10 11:00:16 aswan nss_wins[19340]:    #21 /usr/sbin/winbindd [0x44e599]
Jun 10 11:00:16 aswan nss_wins[19340]: [2009/06/10 11:00:16, 0] lib/util.c:smb_panic(1638)
Jun 10 11:00:16 aswan nmbd[19317]: [2009/06/10 11:00:16, 0] nmbd/nmbd.c:terminate(58)
Jun 10 11:00:16 aswan nmbd[19317]:   Got SIGTERM: going down...
Jun 10 11:00:22 aswan nss_wins[19340]: [2009/06/10 11:00:22, 0] lib/util.c:smb_panic(1646)
Jun 10 11:00:22 aswan nss_wins[19340]:   smb_panic(): action returned status 0
Jun 10 11:00:22 aswan nss_wins[19340]: [2009/06/10 11:00:22, 0] lib/fault.c:dump_core(181)
Jun 10 11:00:22 aswan nss_wins[19340]:   dumping core in /var/log/samba/cores/winbindd
Jun 10 11:00:22 aswan nss_wins[19340]:


[smb.conf](global)
   unix charset = LOCALE
   workgroup = xxxxxx
   log level = 10
   security = ads
   realm = xxxxxx.co.jp
   idmap uid = 30001-40000
   idmap gid = 30001-40000
   template homedir = /home/%U
   template shell = /sbin/nologin
   winbind separator = +
   encrypt passwords = yes
   password server = xxxxxx(DC)
   name resolve order = wins bcast hosts
   winbind use default domain = yes
   smb ports = 139
   load printers = no
   log file = /var/log/samba/log.%m
   max log size = 0
   dns proxy = no
   display charset = UTF8
   unix charset = UTF8
   dos charset = CP932
   wins server = xxx.xxx.xxx.xxx(他セグメントのWINS)
   domain master = no
   local master = no
   os level = 20
   disable spoolss = no

[nsswitch.conf]
passwd: compat winbind
group: compat winbind
shadow: compat winbind

hosts:          files wins dns
networks:       files

protocols:      db files
services:       db files
ethers:         db files
rpc:            db files

netgroup:       nis