After upgrading WordPress to 2.6 (and now 2.6.2) I'm completely unable to register anyone. I have disabled and re-enabled Register Plus and still get the following issues:
In the WP Admin area, all the fields are empty for someone I try to register.
If I go to the wp_users table, the created user has NULL in the ID field and NULL under user_activation_key and user_status.
Can anyone tell me how to fix this, or failing that, how to remove Register Plus so I can at least register some people?