byte[] bytes = config.getMediumBytes();
    if (bytes == null) {
      _logger.debug("medium bytes are null for: " + config.getOriginalPath());
      _logger.debug("how about large bytes: " + config.getLargeBytes());
      _logger.debug("how about small bytes: " + config.getSmallBytes());
      _logger.debug("title: " + config.getTitle());
      _logger.debug("caption: " + config.getCaption());
    }
    _progress.notifyProgressStarted(config.getOriginalPath(), bytes.length);