Re: Registration notification email not sent & captchas — BP 1.2 beta / WP 2.9.1
1) By default, an email isn’t sent to the user because the user password is sent via plain text (not a good thing security-wise).
You can re-enable this welcome email by adding the following code to /wp-content/plugins/bp-custom.php (create this file if you don’t have one – be sure to add PHP open and closing tags as well):
remove_filter( 'wpmu_welcome_user_notification', 'bp_core_disable_welcome_email' );
2) Please post the avatar bug on BuddyPress Trac:
Login with the same credentials you use on buddypress.org.
3) WP-reCAPTCHA is not compatible with BuddyPress.
BuddyPress uses a different registration mechanism.
You might want to try one of these solutions listed here: