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Yes get rid (comment out) the lines of code (mngluser.php) below and write your own validation to check if email or username exists. Pull all of the usernames from the SQL column, then use PHP to check if any matches the one the user selected. Do the same with e-mail. Must be a problem with the paths in the object.

Somehow, the if statements below are always true, hence the errors appearing no matter what.

$user_id = username_exists( $user_login );
$available = MnglUtils::username_is_available( $user_login );

if ( $user_id or !$available)
$errors[] = __('Username is Already Taken.','mingle');

if(email_exists($user_email))
$errors[] = __('Email Address has already been used by another user.','mingle');

Ok I found the solution. Open classes/controller/MnglUsersController and insert this code between the last two closing brackets of the process_signup_form function, roughly line 156. Place the code:

if(empty($errors)) {
$creds = array();

$creds['user_login'] = $user_login;
$creds['user_password'] = $new_password;
$creds['remember'] = $rememberme;

if(!function_exists('wp_signon'))
require_once(ABSPATH . WPINC . '/user.php');

wp_signon($creds);

$redirect_to = ((!empty($redirect_to))?$redirect_to:get_permalink($mngl_options->activity_page_id));

MnglUtils::wp_redirect($redirect_to);
exit;
}

This logs the user in after they sign up and takes them to the activity page.

I have the same problem, It seems the code is executed twice…I get this problem with registration, sending message and uploading avatar. The first action works, but for some reason an second action is executed, and that gives the errors. Is has something to do with mingle. I Use Woo Themes. Anybody news?