Fatal error: Cannot use object of type stdClass as array in /feeds/mappers/taxonomy.inc on line 98

I'm getting this error with the latest beta5 of feeds.

Everything worked fine with beta3 with the tax inherited patch.

Apache/2.2.9 (Debian) DAV/2 SVN/1.5.1 PHP/5.2.13 mod_ssl/2.2.9 OpenSSL/0.9.8g

The inherited vocabulary is a very basic vocabulary with 3-5 terms each.

$feeds_importer = new stdClass;
$feeds_importer->disabled = FALSE; /* Edit this to true to make a default feeds_importer disabled initially */
$feeds_importer->api_version = 1;
$feeds_importer->id = 'video';
$feeds_importer->config = array(
  'name' => 'Video',
  'description' => '',
  'fetcher' => array(
    'plugin_key' => 'FeedsHTTPFetcher',
    'config' => array(
      'auto_detect_feeds' => FALSE,
      'use_pubsubhubbub' => FALSE,
      'designated_hub' => '',
    ),
  ),
  'parser' => array(
    'plugin_key' => 'FeedsSyndicationParser',
    'config' => array(),
  ),
  'processor' => array(
    'plugin_key' => 'FeedsNodeProcessor',
    'config' => array(
      'content_type' => 'feed_video_item',
      'update_existing' => '2',
      'expire' => '-1',
      'mappings' => array(
        0 => array(
          'source' => 'guid',
          'target' => 'guid',
          'unique' => 1,
        ),
        1 => array(
          'source' => 'url',
          'target' => 'url',
          'unique' => 1,
        ),
        2 => array(
          'source' => 'url',
          'target' => 'field_feed_video_video',
          'unique' => FALSE,
        ),
        3 => array(
          'source' => 'title',
          'target' => 'title',
          'unique' => FALSE,
        ),
        4 => array(
          'source' => 'timestamp',
          'target' => 'created',
          'unique' => FALSE,
        ),
        5 => array(
          'source' => 'description',
          'target' => 'body',
          'unique' => FALSE,
        ),
        6 => array(
          'source' => 'parent:taxonomy:1',
          'target' => 'taxonomy:1',
          'unique' => FALSE,
        ),
        7 => array(
          'source' => 'parent:taxonomy:5',
          'target' => 'taxonomy:5',
          'unique' => FALSE,
        ),
      ),
      'author' => 0,
      'input_format' => 0,
    ),
  ),
  'content_type' => 'feed_video',
  'update' => 0,
  'import_period' => '0',
  'expire_period' => 3600,
  'import_on_create' => 1,
);