plugin=diff is not implemented.
http://yellow.ribbon.to/~tuotehhou/index.php?%2BDL%2B%E3%83%88%E3%83%AC%E3%83%8B%E3%83%B3%E3%82%B0%E7%B5%8C%E9%81%8E%E5%9B%B3
plugin=diff is not implemented.