[Samba] trustdom station can no more connect after upgrade to 3.2.0

[François LEGAL]

Hello,

I just upgrade from a 3.0.29 PDC that was trusting another domain, and since then, the TRUSTED domain users can no more access the shares on this server (nor browse users list or group list).
I did increase the log level to 4 and found the following entries :

[2008/07/22 11:48:46,  3, pid=9849, effective(0, 0), real(0, 0)] smbd/password.c:register_existing_vuid(314)
  register_existing_vuid: User name: TRUSTEDDOM\trusteduser	Real name: Delphine Heslot
[2008/07/22 11:48:46,  3, pid=9849, effective(0, 0), real(0, 0)] smbd/password.c:register_existing_vuid(326)
  register_existing_vuid: UNIX uid 3010 is UNIX user TRUSTEDDOM\trusteduser, and will be vuid 100
[2008/07/22 11:48:46,  1, pid=9849, effective(0, 0), real(0, 0)] smbd/session.c:session_claim(112)
  Re-using invalid record
...
[2008/07/22 11:48:46,  0, pid=9849, effective(0, 0), real(0, 0)] libsmb/smb_signing.c:srv_check_incoming_message(754)
  srv_check_incoming_message: BAD SIG: seq 2 wanted SMB signature of
[2008/07/22 11:48:46,  0, pid=9849, effective(0, 0), real(0, 0)] libsmb/smb_signing.c:srv_check_incoming_message(758)
  srv_check_incoming_message: BAD SIG: seq 2 got SMB signature of
...
[2008/07/22 11:48:46,  3, pid=9849, effective(3010, 3012), real(3010, 0)] smbd/service.c:make_connection_snum(1190)
  trustedmachine (1.1.2.3) connect to service IPC$ initially as user TRUSTEDDOM\trusteduser (uid=3010, gid=3012) (pid 9849)
[2008/07/22 11:48:46,  3, pid=9849, effective(3010, 3012), real(3010, 0)] smbd/sec_ctx.c:set_sec_ctx(324)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2008/07/22 11:48:46,  3, pid=9849, effective(0, 0), real(0, 0)] smbd/reply.c:reply_tcon_and_X(727)
  tconX service=IPC$
[2008/07/22 11:48:46,  3, pid=9849, effective(0, 0), real(0, 0)] smbd/process.c:smbd_process(2027)
  receive_message_or_smb failed: NT_STATUS_END_OF_FILE, exiting


while having a trusted user trying to connect to a share.

Any idea where this comes from ?