This is a libtorrent 0.15.x series bug. I have already filed a debian bug. Here: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717933
Here are 2 possible workarounds: 1. Use libtorrent 0.16.x series. Users have reported that it works perfectly 2. Go to qbt options and disable peer encryption. Tools->Options...->BitTorrent->Encryption mode
