plugin=diff is not implemented.
http://tuotehhou.y.ribbon.to/index.php?%2BWindowPhone%2B%E3%83%91%E3%83%95%E3%82%A9%E3%83%BC%E3%83%9E%E3%83%B3%E3%82%B9%E3%81%AB%E9%96%A2%E3%81%99%E3%82%8B%E8%80%83%E6%85%AE%E4%BA%8B%E9%A0%85
plugin=diff is not implemented.