Late in the 3.0-Alpha series, local groups in /etc/group displayed in this dialog, but no more as of 3.0.0beta1. This dramatically reduces the effectiveness of ACLs in workgroup mode.
the only groups which will appear are those which have a group mapping entry. This is by design. Same thing with users (exists in passdb)
Jerry, this is a change in behavior from previous versions that people may not know about or expect. Is it doccumented?
originally reported against one of the 3.0.0rc[1-4] releases. Cleaning up non-production versions.