Please don't reopen a fixed bug at random. Why on earth do you believe this is the same problem?! None of the symtoms you describe is similar. It's not because it has high priority that people will fix your bug more quickly. As you said yourself, "I checked and /etc/groups did not appear to be overwritten".
So please file a new report, and add to it the output of apt-cache policy system-tools-backends liboobs gnome-system-tools And try reinstalling these packages with sudo apt-get install --reinstall system-tools-backends liboobs gnome-system-tools This reminds me of an old bug that was fixed last cycle. ** Changed in: system-tools-backends Status: New => Fix Released ** Changed in: system-tools-backends (Ubuntu) Status: New => Fix Released -- users-admin (System->Administration->Users and Groups) overwrites group file https://bugs.launchpad.net/bugs/160862 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs