"inherit owner" does not work, if both inherit acls and inherit permissions are yes and the default ACLfor owner is not set for "rwx".

Here is a reproduce setting:

smb.conf
-----
[share]
  path = /some/where/share
  writeable = yes
  inherit owner = yes
  inherit acls = yes
  inherit permissions = yes

ACL setting:
------------
# getfacl share/
# file: share/
# owner: root
# group: root
user::rwx
group::r-x
group:group1:rwx
mask::rwx
other::r-x
default:user::r-x <--- set other than "rwx"
default:group::---
default:group:group1:---
default:mask::rwx
default:other::---

Permission setting:
-------------------
# ls -l
total 8
drwxrwxr-x+ 40 root   root   4096 Aug 21 16:52 share

And access as an USER who belongs to "group1" group.

If we create any directory under share, the owner of the directory set to the USER, not to "root".

log.smbd shows:
-----
[2010/08/21 16:29:56.868131,  0] smbd/open.c:315(change_dir_owner_to_parent)
  change_dir_owner_to_parent: device/inode/mode on directory New Folder (17). Refusing to chown !
-----

This means the mode of the directory is not same: 

To examine, I modify the source code:

-----
        /* Ensure we're pointing at the same place. */
        if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
            smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
            smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
                DEBUG(0,("change_dir_owner_to_parent: "
                         "device/inode/mode on directory %s changed %o:%o. "
                         "Refusing to chown !\n", fname, smb_fname_cwd->st.st_ex
_mode, psbuf->st_ex_mode ));
-----

And the log.smbd shows:
-----
[2010/08/21 16:46:42.164735,  0] smbd/open.c:315(change_dir_owner_to_parent)
  change_dir_owner_to_parent: device/inode/mode on directory New Folder (29)
 changed 40775:40570. Refusing to chown !
-----

#6507 may be the same problem.