[Samba] Winbind user/group name case change

[Lars Hanke]

My Synology NAS runs Samba 3.6.9 and maps accounts using winbind. It is 
joined to my samba4 AD. I set "winbind use default domain=yes" and have 
no entry for "winbind normalize names". Strangely a group like "Domain 
Users" appears as "domain users", i.e. in all lower case. A translation 
which breaks idmapd for NFSv4.

My Debian Wheezy 3.6.6 behaves the same way. Is there some option to 
keep the case?

Alternatively, does someone know whether it is possible to tell idmapd 
to ignore case?

Thanks for your help,
  - lars.