[dkane]

Unable to register at
http://alpha.seamframework.org:9999/userRegister_d.seam

Stays on the same page after clicking "Register", no validation messages are shown. Probably password is too short (4 characters), but I have not been notified explicitly about that.

Anti-robot characters picture is not being regenerated when I reload this page. Common practice on websites is picture regeneration for each next attempt. Your implementation seems to be too stateful, keeping image the same over the whole session.