Yes, it's logical that all torrents will still have connected peers soon after they were deleted from the tracker and the client receives the error. Unless you manually check a few hundred torrents' tracker tab for the unregistered torrent message and manually stop the torrent and restart it so you can see the red upload arrow (<-which by the way means seeding but with tracker error, according to uTorrent's help). Or closing and restarting uTorrent. That isn't a very practical way to find out which torrents were deleted or have errors reported by the tracker. It wasn't like that before 2.2.1. Torrents used to turn red the moment the tracker sent an error. So I assumed it was a bug. It's kind of a strange behavior and I think there should at least be an option to revert to the old way. utorrent help says blue up arrow means seeding without any issue. Red up arrow means seeding but with a tracker error (with or without peers connected, as in all pre 2.2.1 uT versions). So how is it normal that the blue upload arrow is shown when the actual status is "seeding but with tracker error" (<- represented by red upload icon, according to the manual)?