User registration errors... help!

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I've been fiddling with user registration for a site I'm working on and I've finally managed to get C5 to allow a new user to register on the site from the /register page - but I get this series of errors:


Warning: Invalid argument supplied for foreach() in /home5/epicover/public_html/concrete/mail/user_register_approval_required.php on line 14

Warning: session_regenerate_id() [function.session-regenerate-id]: Cannot regenerate session id - headers already sent in /home5/epicover/public_html/concrete/models/user.php on line 71

Warning: Cannot modify header information - headers already sent by (output started at /home5/epicover/public_html/concrete/mail/user_register_approval_required.php:14) in /home5/epicover/public_html/concrete/libraries/controller.php on line 356

I have little idea what this means - however, it does still set up the user and generates an email to me from which I can activate the user.

Can anyone help? This is quite urgent... thanks

WebOnTheWebb