I had a group name with spaces, "Linux Admins", and when I tried to use it as a
destination in a notification, it would just show up as "Linux" when I would
edit the initial targets, and choose the "Linux Admins" group, at which point
any notifications going to that group would fail. After changing the group name
to "LinuxAdmins" and editing the initial targets for the notification, it seems
to work correctly.