Userref missing

Just added a new type to the list of types on my calender view.

This has a field_user (a user reference) field. So I added this field to the view fields list.

The nodes are showing, showing title, and date - but the userref is not displaying. node_data_field_user in the export:

  $view = new stdClass();
  $view->name = 'calendar';
  $view->description = 'Calendar';
  $view->access = array (
);
  $view->view_args_php = '';
  $view->page = TRUE;
  $view->page_title = 'Calendar';
  $view->page_header = '';
  $view->page_header_format = '1';
  $view->page_footer = '';
  $view->page_footer_format = '1';
  $view->page_empty = '';
  $view->page_empty_format = '1';
  $view->page_type = 'calendar';
  $view->url = 'cal';
  $view->use_pager = FALSE;
  $view->nodes_per_page = '100';
  $view->menu = TRUE;
  $view->menu_title = 'Calendar';
  $view->menu_tab = FALSE;
  $view->menu_tab_default = FALSE;
  $view->menu_tab_weight = '0';
  $view->sort = array (
  );
  $view->argument = array (
    array (
      'type' => 'calendar_year',
      'argdefault' => '2',
      'title' => '',
      'options' => '',
      'wildcard' => '',
      'wildcard_substitution' => '',
    ),
    array (
      'type' => 'calendar_month',
      'argdefault' => '2',
      'title' => '',
      'options' => '',
      'wildcard' => '',
      'wildcard_substitution' => '',
    ),
    array (
      'type' => 'calendar_day',
      'argdefault' => '2',
      'title' => '',
      'options' => '',
      'wildcard' => '',
      'wildcard_substitution' => '',
    ),
  );
  $view->field = array (
    array (
      'tablename' => 'node',
      'field' => 'title',
      'label' => '',
      'handler' => 'views_handler_field_nodelink',
      'options' => 'link',
    ),
    array (
      'tablename' => 'node_data_field_start',
      'field' => 'field_start_value',
      'label' => '',
      'handler' => 'content_views_field_handler_group',
      'options' => 'default',
    ),
    array (
      'tablename' => 'node_data_field_date',
      'field' => 'field_date_value',
      'label' => '',
      'handler' => 'content_views_field_handler_group',
      'options' => 'default',
    ),
    array (
      'tablename' => 'node_data_field_date_0',
      'field' => 'field_date_0_value',
      'label' => '',
      'handler' => 'content_views_field_handler_group',
      'options' => 'default',
    ),
    array (
      'tablename' => 'node_data_field_user',
      'field' => 'field_user_uid',
      'label' => '',
      'handler' => 'content_views_field_handler_group',
      'options' => 'default',
    ),
  );
  $view->filter = array (
    array (
      'tablename' => 'node',
      'field' => 'status',
      'operator' => '=',
      'options' => '',
      'value' => '1',
    ),
    array (
      'tablename' => 'node',
      'field' => 'type',
      'operator' => 'OR',
      'options' => '',
      'value' => array (
  0 => 'in_out',
  1 => 'lunch',
  2 => 'meeting',
),
    ),
  );
  $view->exposed_filter = array (
  );
  $view->requires = array(node, node_data_field_start, node_data_field_date, node_data_field_date_0, node_data_field_user);
  $views[$view->name] = $view;