For me it seems like it's related to this issue: https://bugs.kde.org/show_bug.cgi?id=354633
(I also confirm similar behavior on Ubuntu 15.10..) ** Changed in: ktorrent (Ubuntu) Status: Expired => Confirmed ** Bug watch added: KDE Bug Tracking System #354633 https://bugs.kde.org/show_bug.cgi?id=354633 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1512010 Title: UI Becomes Unresponsive To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ktorrent/+bug/1512010/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs