I posted this in the UNIX forum, but got no response. So, I thought I'd post here where there is more traffic...
Recently I created a new standard user on my iMac running 10.3.2. I wanted to test some file sharing between this user and my regular admin user. I noticed that I couldn't access some of the files I'd created under the "Users/Shared" folder. After doing some investigation, I've discovered a discrepancy in the groups assigned to my users.
My admin users which were originally created under 10.1 (or 10.2, I'm not sure) are members of staff, wheel, and admin. However, if I create a new admin user called test2, it is a member of test2, appserverusr, admin, and appserveradm. If I create a standard user now, it is a member of a group of the same name; so a user called "wimp" would be part of a group called "wimp". It is not part of staff.
So, my questions are: why are admin users no longer part of wheel, and why are standard users no longer part of staff? This seems to be causing problems with my attempts to share files between the users.
Note: under 10.3, all users were created using the Accounts System Preference pane.