If you have the following defined in smb.conf: winbind use default domain = yes then using DOMAIN\Username instead of Username in the "admin users" option for a share does not work (where DOMAIN is the default domain). This is with a Windows 2000 ADS domain, if it makes any difference.
I think I know how to fix this in user_in_list(). We need to mangle the entered username, not the ones in the list. I'll try this tomorrow.
The original bug has been fixed. We always use 'DOMAIN\username' in user_in_list(). Therefore you must always use the "DOAMIN\..." form of a user or group in smb.conf for winbindd NSS accounts.
originally reported against 3.0.0beta3. CLeaning out non-production release versions.
sorry for the same, cleaning up the database to prevent unecessary reopens of bugs.
database cleanup