I tried to use 3.0.0rc1 as PDC with ldapsam_compat (I had already nice 2.2 LDAP
structure so I was lazy :) ). I've altered samba.schema from 3.0.0rc1 to enable
2.2 objectClass=SambaAccount

When joining new machine (win2k) to domain, smbd hangs forever with 100% of CPU
Power used.
Also pdbedit --list does the same after listing some users.

gdb'ing pdbedit --list and Ctrl-C after hang shows the following backtrace:
------------------
#0  realloc_string_sub (
    string=0x406ff008
"\\\\newmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastnewmastne"...,
pattern=0x80c82d1 "%L",
    insert=0x407194dc
"er\\inf1_\tlogonewmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwmasterwma"...)
at lib/util_str.c:923
#1  0x080998d8 in alloc_sub_basic (smb_name=0xbfffd420 "inf1$", str=0x1a4d4
<Address 0x1a4d4 out of bounds>)
    at lib/substitute.c:496
#2  0x08099c93 in alloc_sub_specified (input_string=0x1a4d4 <Address 0x1a4d4 out
of bounds>,
    username=0xbfffd420 "inf1$", domain=0xbfffd020 "NEWAREX", uid=1006, gid=553)
at lib/substitute.c:642
#3  0x08099b33 in talloc_sub_specified (mem_ctx=0x1a4d4, input_string=0x1a4d4
<Address 0x1a4d4 out of bounds>,
    username=0x1a4d4 <Address 0x1a4d4 out of bounds>, domain=0x1a4d4 <Address
0x1a4d4 out of bounds>, uid=107732,
    gid=107732) at lib/substitute.c:577
#4  0x0806eb7c in init_sam_from_ldap (ldap_state=0x8196820, sampass=0x8198388,
entry=0x8198e30)
    at passdb/pdb_ldap.c:643
#5  0x0807041d in ldapsam_getsampwent (my_methods=0x1a4d4, user=0x8198388) at
passdb/pdb_ldap.c:1022
#6  0x0806a557 in context_getsampwent (context=0x81966c8, user=0x8198388) at
passdb/pdb_interface.c:145
#7  0x0805a5ac in print_users_list (in=0x81966c8, verbosity=0, smbpwdstyle=0) at
utils/pdbedit.c:221
#8  0x0805ba33 in main (argc=107732, argv=0x1a4d4) at utils/pdbedit.c:716
#9  0x42015574 in __libc_start_main () from /lib/tls/libc.so.6
------------------

It seems that it is infinitely adding some string in some 'while' loop.
(newmaster is pdc server name)

pdbedit --list --debug 10 shows on the end (before hang):
-------------------
ldapsam_search_one_group: searching
for:[(&(objectClass=sambaGroupMapping)(gidNumber=553))]
Entry found for group: 553
smbldap_get_single_attribute: [description] = [<does not exist>]
pdb_set_group_sid: setting group sid S-1-5-21-3814305432-3506490953-2292666802-2107
element 18 -> now SET
element 20 -> now SET
element 5 -> now SET
element 6 -> now SET
element 7 -> now SET
element 8 -> now SET
element 9 -> now SET
smbldap_get_single_attribute: [displayName] = [<does not exist>]
pdb_set_full_name: setting full name inf1$, was
element 12 -> now SET
smbldap_get_single_attribute: [homeDrives] = [<does not exist>]
pdb_set_dir_drive: setting dir drive H:, was NULL
smbldap_get_single_attribute: [smbHome] = [<does not exist>]
------------------