Closing then. Thanks for your observations, but these are completely separate problem that apparently come from adduser/deluser, and should be reported to its authors. adduser/deluser are developed by Debian, you may want to report a bug there - hoping somebody is still working on them.
** Changed in: gnome-system-tools (Ubuntu) Status: Incomplete => Invalid -- users-admin won't let you change anything about a user with "invalid" username https://bugs.launchpad.net/bugs/222290 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-system-tools in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs