Deluge
I upgraded my deluge installation from 1.2.3 version to 1.3rc1!
After starting daemon I tried to connect, but nothing displayed in GTK interface, in web after some time displayed message about broken connection to daemon.
Learning Logs says about problem in .state files. I removed state folder, started daemon, added torrents, interface working for first time while checking files and some time while downloading, but later the same problem.
I played enough with state files... So daemon working, logs are empty, but GTK and web interface displays nothing... only displays that service working in connection dialog.
I downgraded to 1.2.3 that working fine for me...