Thanks for reporting this bug and helping to make Ubuntu better. Googling for that error message in relation to torrents, I found several hits that led back to this upstream ticket: https://bugzilla.kernel.org/show_bug.cgi?id=12821
It looks like this was an ext4 issue that's been fixed upstream. ** Bug watch added: Linux Kernel Bug Tracker #12821 http://bugzilla.kernel.org/show_bug.cgi?id=12821 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/748936 Title: transmission caused ext4-fs crash -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs