Why don't you allow retrieval of username? You say you do, but the emails you send only offer a password change, which is no **bleep** use without a user name. I have re-registered under a new user name, but that should not be necessary.
I mean the Community Forum username. The forum will not allow my email address. My current username is indeed ianburden but that is new. As I said, I had to re-register in desperation.
