enabling anonymous commenting overnight, since Brigid said she could not get the comment registration to take…and as a result had to delete 50+ spam comments this morning. So I turned it back off.
I did add WordPress.com registration to the possible external registration agents. So they now include OpenID, WordPress.com, and Google as well as the native MovableType registration.
At some point I’ll upgrade to MT 5 and maybe the trouble will go away.