Nodewords breaks core's content type import feature

If you export a content type with nodewords enabled then the following snippet appears in the export:

  'nodewords_edit_metatags' => true,
  'nodewords_metatags_generation_method' => '1',
  'nodewords_metatags_generation_source' => '2',
  'nodewords_use_alt_attribute' => 1,
  'nodewords_filter_modules_output' => 
  array (
    0 => 1,         #<----------- This line breaks the import!
    'imagebrowser' => false,
    'img_assist' => false,
  ),
  'nodewords_filter_regexp' => '',

The line marked breaks the import with a standard "Illegal selection detected!" error. If you remove the line then the import succeeds. I guess this is to do with the way the filter checkboxes are stored/edited in the node form.