samba - May 2007 - Two Permissions Issues: null session shares and group membership

I have Samba 3.0.25rc3 running on OpenSolaris build 67.  Samba is integrated
with our Active Directory via Kerberos.  I do not have nsswitch running with
winbind at this time.

Issue #1: Samba denies access to a share set up with "public = yes"
when
accessed by an AD integrated user account.

The share is defined as follows:
[open]
        comment = Null Session Share
        path = /pool/open
        public = yes
        browseable = yes
        create mask = 0666
        directory mask = 0777
        guest account = nobody
        force user = nobody
        guest ok = yes

The directory is:
vault2:/pool#ls -al | grep open
drwxrwxrwx   2 nobody   sys            2 May  8 11:16 open
vault2:/pool#

When I connect to the share with a valid AD user account, I receive the
following message on the client: "The specified user does not exist." 
The
log of the session on the server (snipped for brevity):

...
[2007/05/08 13:16:15, 3] smbd/sesssetup.c:(1060)
  NativeOS=[Windows 2002 Service Pack 2 2600] NativeLanMan=[Windows 2002
5.1] PrimaryDomain=[]
[2007/05/08 13:16:15, 3] smbd/sesssetup.c:(697)
  reply_spnego_negotiate: Got secblob of size 1462
[2007/05/08 13:16:15, 3] libads/kerberos_verify.c:(172)
  ads_keytab_verify_ticket: krb5_rd_req failed for all 9 matched keytab
principals
[2007/05/08 13:16:15, 3] smbd/sesssetup.c:(321)
  Ticket name is [wcerich@PIONEER.WORLD]
[2007/05/08 13:16:15, 4] lib/substitute.c:(407)
  Home server: vault2
[2007/05/08 13:16:15, 4] lib/substitute.c:(407)
  Home server: vault2
[2007/05/08 13:16:15, 3] passdb/lookup_sid.c:(1115)
  store_gid_sid_cache: gid 15000 in cache ->
S-1-5-21-1409556225-1798326808-5522801-512
....
[2007/05/08 13:16:16, 3] passdb/lookup_sid.c:(1071)
  fetch gid from cache 15002 -> S-1-5-32-545
[2007/05/08 13:16:16, 3] smbd/password.c:(280)
  User name: wcerich    Real name: Eric Hill
[2007/05/08 13:16:16, 3] smbd/password.c:(301)
  UNIX uid 10000 is UNIX user wcerich, and will be vuid 102
[2007/05/08 13:16:16, 3] smbd/password.c:(332)
  Adding homes service for user 'wcerich' using home directory:
'/pool/home/wcerich'
[2007/05/08 13:16:16, 3] smbd/process.c:(1068)
  Transaction 3 of length 82
[2007/05/08 13:16:16, 3] smbd/process.c:(926)
  switch message SMBtconX (pid 1126) conn 0x0
[2007/05/08 13:16:16, 3] smbd/sec_ctx.c:(241)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2007/05/08 13:16:16, 4] smbd/reply.c:(506)
  Client requested device type [?????] for share [OPEN]
[2007/05/08 13:16:16, 3] lib/access.c:(312)
  check_access: no hostnames in host allow/deny list.
[2007/05/08 13:16:16, 2] lib/access.c:(323)
  Allowed connection from  (10.3.10.3)
....
[2007/05/08 13:16:16, 3] smbd/sec_ctx.c:(356)
  pop_sec_ctx (0, 0) - sec_ctx_stack_ndx = 0
[2007/05/08 13:16:16, 1] auth/auth_util.c:(1110)
  sid_to_uid for nobody (S-1-22-1-60001) failed
[2007/05/08 13:16:16, 3] smbd/error.c:(106)
  error packet at smbd/reply.c(514) cmd=117 (SMBtconX)
NT_STATUS_NO_SUCH_USER
[2007/05/08 13:16:16, 3] smbd/process.c:(1068)
  Transaction 4 of length 43
[2007/05/08 13:16:16, 3] smbd/process.c:(926)
  switch message SMBulogoffX (pid 1126) conn 0x0
[2007/05/08 13:16:16, 3] smbd/sec_ctx.c:(241)
  setting sec ctx (0, 0) - sec_ctx_stack_ndx = 0
[2007/05/08 13:16:16, 3] smbd/reply.c:(1560)
  ulogoffX vuid=102

Is this failing because of the "sid_to_uid for nobody ... failed"
message,
or some other problem?  Heck, maybe I'm just not setting the share up
correctly... :)

Issue #2: Unix users belonging to a unix group are denied access to a
directory/file, even though the unix user account is a member of the group.

Given the following file/account settings:

vault2:/pool/data#ls -al | grep example
drwxrwx---   2 nobody   group1        10 May  8 10:00 example
vault2:/pool/data#cat /etc/group | grep group1
group1::100:wcerich
vault2:/pool/data#

When I attach to the "data" share as wcerich, I do not have access to
the
example directory, even though I am a member of unix group1 and the group
has full access to the directory.

Can anyone help me out with either of these two issues?

Eric