User account group has no #type

The form element for user account has no default #type set in user_account_form of user.module. This means drupal_process_form always sets this element to #processed=false since there is no default #process to run on it. This probably has no major implications except that the field_group module only allows elements with #processed=true inside field groups and therefore user account information cannot be placed inside a field group (see http://drupal.org/node/1182198). The obvious patch is to set $form['account']['#type'] = 'container'.