[Samba] group permissions broken after upgrade 3.2.5 -> 3.4.8:deleting of files denied

[tms3 at tms3.com]

SNIP
> [2010/06/14 11:43:21, 10] smbd/posix_acls.c:3045(add_or_replace_ace)
> Replacing ACE 1 with SID S-1-5-32-545 and flags 00
> [2010/06/14 11:43:21, 10] smbd/posix_acls.c:3007(merge_default_aces)
> merge_default_aces: Merging ACE 3 onto ACE 1.
> [2010/06/14 11:43:21, 10] smbd/open.c:2952(create_file_unixpath)
> create_file_unixpath: open file Temp/Neu Textdokument.txt for delete 
> ACCESS_DENIED
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Why is this being denied?