[Samba] Groupname is not shown

[Student2 SIM]

Hi folks,

I'm running Samba 3beta authenticating against ADS and everything works very well, expect for the fact that when trying to list files' owners and groups on the Samba Box, the group name is not shown. Just the GID is listed!
Is this a normal function or does anyone know a hint how to fix??

Example:

-rwxrw-r--    1 SIM*sascha 30000          85 Jun 27 10:30 test.txt

Greetz

Sascha Stroh