title fails to link to the correct entity uri

hi,

I changed the uri of all nodes by using hook_entity_info_alter like this:

function custom_entity_info_alter(&$entity_info) {
  $entity_info['node']['uri callback'] = 'my_custom_url_callback';
}

function my_custom_url_callback($node) {
  return array(
    'path' => 'foo/bar/' . $node->nid,
  );
}

when I now for example set the image-formatter on 'link to content', it properly links to foo/bar/123. but the ds title field still links to node/123

In ds_render_field is a structure like this:

  if ($settings['link']) {
    if (isset($field['entity']->uri['path'])) {
      $path = $field['entity']->uri['path'];
    }
    else {
      $entity_key = $field['properties']['entity_id_key'];
      $entity_path = $field['properties']['entity_path'];
      $path = $entity_path . '/' . $field['entity']->{$entity_key};
    }
    $output = l($output, $path);
  }

I found out that $field['entity']->uri is never defined here. I'm not much into this but it seems to be a bug. is it?