Re:

...

There has been a lot of discussion about this, and I'm afraid it's too late to change the *default* behavior now...

Why? It seems to me the X-Anon-Password header was a pretty major change, yet you made that change to preserve people's pseudonymous identities. The instant challenge is just as grave, don't you think?

It still didn't affect much of the functionality. You can still post, and mail to anXXXX users without knowing anything about passwords or X-Anon headers. And you only need to set your password to "none" to get the old behaviour. Julf