--- /sites/all/modules/ubercart/uc_cart/uc_cart_checkout_pane.inc	do jul 15 19:20:10 2010
+++ /sites/all/modules/ubercart/uc_cart/uc_cart_checkout_pane.inc	za okt  9 15:39:30 2010
@@ -156,7 +156,8 @@
           $user->uid == 0) {
         // Skip if an account already exists for this e-mail address.
         if (db_fetch_object(db_query("SELECT uid FROM {users} WHERE LOWER(mail) = LOWER('%s')", $arg2['primary_email'])) > 0) {
-          drupal_set_message(t('An account already exists for your e-mail address. The new account details you entered will be disregarded.'));
+          drupal_set_message(t('An account already exists with this e-mail address. You will either need to login with with this e-mail address or use a different e-mail address.'), 'error');
+          return false;
         }
         else {
           // Validate the username.