did you try combination of
http://bvlist.com/template-shares/22...ad-scrape.html
i think my benc was coded and scrape is one of suggested and tracker started acting well
also if you're creating some bad torrents or with some weird encoding that would cause an issue it's best to create torrents using Torrent Maker or Azureus from both i never had any issues but utorrent some users complained about that issue