[Samba] Could not convert sid ..... to ..... gid

[Olaf.Boldt at hvbg.hessen.de]

Hi!
More than a week ago I sent the below-mentioned message but did not receive any answer.
I think that the subject heading was not correct, and so I changed it.
Hope that I will get an answer now.

Olaf

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Von: Boldt, Olaf (HVBG) 
Gesendet: Mittwoch, 27. April 2011 14:58
An: 'samba at lists.samba.org'
Betreff: Problems with Squid and Active Directory

Hello!

Since a few weeks I have Squid Version 2.7.STABLE7 on Ubuntu Server 10.04. All worked fine - different users in an AD-Group could reach the internet through my proxy. Because of this my Squid-configuration seems to be OK. Since the name of the AD-Group was changed it is no more possible to reach the internet through the proxy. The error is:
"Access control configuration prevents your request from being allowed at this time."  

Switching to the old group name all works fine again, switching to the new one: the same error as above.

I changed the debug options and found this entry in cache.log:
"Could not convert sid S-1-5-21-3365863304-72330373-946326852-415981 to gid"

>From the Squid Mailing List I got the answer that this is a problem of Samba and/or winbind.
I have installed:
samba  2:3.4.7~dfsg-1ubuntu3.5
winbind 2:3.4.7~dfsg-1ubuntu3.5

What to do?

Thanks!
Olaf