Unknown group after TM restore

On my previous mac, I created a group in /etc/group to enable file sharing between multiple local users. It seems that the TM restore of the users files copied the group permission bits correctly, but did not update /etc/group. That is, when I do an "ls -l" on a shared folder, I see the group-id, and not the group name. In addition, other users of the group are not able to view the shared files in the Finder.
I then added the entry to /etc/group and rebooted, but that did not change anything.
How can I restore shared group file access?
Thanks,
Anthony

Anthony Discolo wrote:
Here's what I did:
1. Noted the missing group-id is 100 from the output of ls -l.
2. Created a group in System Preferences/Accounts and used the Advanced Options to set its group-id to 100.
3. Rebooted.
4. Noticed the newly created group is missing from the System Preferences/Accounts groups list (maybe having something to do with the group-id < 500?).</div>
yes, groups with gid <500 don't show up in system preferences.
<div class="jive-quote">5. Noticed the group name was listed in the output of dscl . -list /groups
6. The "(unknown)" group (not the new group name) was still listed in the Sharing & Permissions tab in the Get Info window and was still not removable.
what does
ls -l give now? is the ggroup name correctly reported when you do that? if not just try chgrp.
Where can I find out what database the Finder is reading for the Sharing & Permissions list?
not aware of any such database besides directory services. I suspect Finder interacts with the Directory services directly. Finder is known to do this sort of thing but it shouldn't be happening to groups you make yourself. In particular, users who upgraded from Tiger have GID=UID (in leopard the default GID=20) and their groups display as "unknown" in Finder.

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Message was edited by: V.K.

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