Same observation here. I posted about this on the bug forum (didn't see this thread until now):
http://community.infopop.net/6/ubb.x?a=tpc&s=729094322&f=1863088313&m=5113047114 I posted what I've done to try to isolate the problem over there. Both normal and reverse email bans for both user and host are not functioning. Other email checks like duplicate email and incorrect format email work during registration.
PaulC -
http://www.MonteCarloSS.com
