[Debian SheevaPlug] smbd panic after upgrade from Squeeze to Wheezy

[od@4fcc.de]

@ll,

since May several attempts to upgrade my SheevaPlug from Squeeze to Wheezy
(see e.g. my posts at the Plug Computer Forum
http://www.plugcomputer.org/plugforum/index.php?topic=6258.0).

But any time I end with the issue, that the smbd doesn't come up (dying with
a panic dumnping a core).

root@Sheeva:/var/log/samba# cat log.smbd
[2013/07/22 17:17:12,  0] smbd/server.c:1053(main)
  smbd version 3.6.6 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2011
[2013/07/22 17:17:12.565908,  0] lib/fault.c:47(fault_report)
  ===============================================================
[2013/07/22 17:17:12.566320,  0] lib/fault.c:48(fault_report)
  INTERNAL ERROR: Signal 7 in pid 4249 (3.6.6)
  Please read the Trouble-Shooting section of the Samba3-HOWTO
[2013/07/22 17:17:12.566613,  0] lib/fault.c:50(fault_report)
  From: http://www.samba.org/samba/docs/Samba3-HOWTO.pdf
[2013/07/22 17:17:12.566872,  0] lib/fault.c:51(fault_report)
  ===============================================================
[2013/07/22 17:17:12.567062,  0] lib/util.c:1117(smb_panic)
  PANIC (pid 4249): internal error
[2013/07/22 17:17:12.567847,  0] lib/util.c:1221(log_stack_trace)
  BACKTRACE: 0 stack frames:
[2013/07/22 17:17:12.568130,  0] lib/util.c:1122(smb_panic)
  smb_panic(): calling panic action [/usr/share/samba/panic-action 4249]
[2013/07/22 17:17:17.737940,  0] lib/util.c:1130(smb_panic)
  smb_panic(): action returned status 0
[2013/07/22 17:17:17.738319,  0] lib/fault.c:372(dump_core)
  dumping core in /var/log/samba/cores/smbd

I appreciate any hints as I'm running out of ideas.
-- 
thx & cheers