Okay actually 2 problems
First problem: If you ban an e-mail address in Admin: Setup: Users, the address is only banned by case.
Switch to the unconventional all caps, or alter the case slightly, and the registration will sail right through.
Second problem: Unrelated, but when I attempted to post this message from browser IE 6.0.2800.1106.xpsp2.xxxxxxx (patched with all the latest stuff), I got no text field with the advanced editor, had to switch to the other.
First problem: If you ban an e-mail address in Admin: Setup: Users, the address is only banned by case.
Switch to the unconventional all caps, or alter the case slightly, and the registration will sail right through.
Second problem: Unrelated, but when I attempted to post this message from browser IE 6.0.2800.1106.xpsp2.xxxxxxx (patched with all the latest stuff), I got no text field with the advanced editor, had to switch to the other.