Same problem. 3.0 is too slow for the same setting as 2.2.1. I had enough of 1kB/s for the entire day for every torrent of the same tracker. As soon as I switch back into 2.2.1, every torrent is downloading normally again at 30-40kB/s. As for private tracker, 3.0 speed is same as 2.2.1. Also, 3.0 randomly freezes for no reason. All I have to do is starting a 'stopped' torrent.