I've been using v1.9 build 1538 for some time now and it's been working very well with both TCP and uTP uploading and downloading (via my German ISP). I changed to v2.0 build 16081 and immediately a couple of my torrents received "Corrupt Torrent - Please Delete" error messages from the tracker (as highlighted in posts #5, #13, etc of this topic). Adding new torrents (from Demonoid.com) resulted with this error message with each attempt.