[ShannonA]

Based on the logs, the emails and user names getting reported seem really flaky. Lots of repeats and those blank emails. This is how they're accessed in the code:

$username = $vbulletin->userinfo['username'];
$email = $vbulletin->GPC['email'];

Have they changed by vb4.2?

Edit: That's called in register_addmember_process