samba - Jul 2010 - cannot delete or rename after upgrade to 3.5.4

After upgrading samba from 3.4.8 to 3.5.4, we find that for some of our
shares, we cannot delete or rename files or folders.

Windows mappings to the [home] share can create new folders and files
but when we try to delete or rename we get an error messages like:
	
	You need permission to perform this action

	You require permission from
	S-1-5-21-xxxxxxx-yyyyyyyyyy-zzzzzzzzzz-www
	to make changes to this file

The same actions work fine for other shares like [cs] below.

Here are parts of our smb.conf:

# Global parameters
[global]
	workgroup = DOM
	netbios name = NBNAME
	server string = nbname (Samba %v)
	security = domain
     passdb backend = ldapsam:"ldap://localhost ldap://xxx.xxx.xxx.69 
ldap://xxx.xxx.xxx.187"
	ldap debug level = 257
	interfaces =  ce0 xxx.xxx.xxx.201
	encrypt passwords = yes
     syslog = 0
     log file = /var/log/samba/log.%m
	log level = 2
	max log size = 200
	dns proxy = No
	wins support = yes
	name resolve order = wins host lmhosts
	domain master = no
     local master = no
     preferred master = no
     os level = 65
	domain logons = no
	guest account = ftp
	guest ok = Yes
     hide unreadable = Yes
	ldap admin dn = cn=samba,ou=DSA,dc=cnr,dc=berkeley,dc=edu
	ldap group suffix = ou=Groups
	ldap idmap suffix = ou=Idmap
	ldap machine suffix = ou=Computers
	ldap suffix = dc=cnr,dc=berkeley,dc=edu
	ldap ssl = start tls
	ldap timeout = 30
	ldap user suffix = ou=People
	passdb expand explicit = no
	idmap backend = ldap://localhost
	idmap uid = 1000-30000
	idmap gid = 1000-30000
;	unix extensions = no
;	wide links = yes
	hosts allow = \
xxx.xxx.xxx.0/255.255.255.128, \
(more subnets here) \


; can create new files and folders,
; but cannot delete or rename in [home] shares
[homes]
   comment		= Home Directories
   read only		= no
   writeable		= yes
   browseable	= yes
   public		= no
   inherit permissions = yes
   user			= %U
   hide unreadable = Yes
   force create mode	= 0664
   force directory mode	= 2775
   hosts allow   = \
xxx.xxx.xxx.0/255.255.255.128, \
(more subnets here), \

; create; delete; rename -- all work fine for [cs]
[cs]
   comment		= cs share
   path			= /sdrives/cs
   user			= %U
   writeable		= yes
   force create mode	= 0664
   force directory mode	= 2775
   hide unreadable = Yes