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  // If the user provided a path for a logo or favicon file, make sure a file

  // exists at that path.

    $path = _system_theme_settings_validate_path($form_state['values']['logo_path']);

    if (!$path) {

      form_set_error('logo_path', t('The custom logo path is invalid.'));

    }

  }

    $path = _system_theme_settings_validate_path($form_state['values']['favicon_path']);

    if (!$path) {

      form_set_error('favicon_path', t('The custom favicon path is invalid.'));

  // If the user uploaded a new logo or favicon, save it to a permanent location

  // and use it in place of the default theme-provided file.

    unset($values['logo_upload']);

    $filename = file_unmanaged_copy($file->uri);

    $values['default_logo'] = 0;

    $values['logo_path'] = $filename;

    $values['toggle_logo'] = 1;

  }

    unset($values['favicon_upload']);

    $filename = file_unmanaged_copy($file->uri);

    $values['default_favicon'] = 0;