ktorrent-kde4 closes immediately after starting

Binary package hint: ktorrent-kde4

The main ktorrent-kde4 screen comes up and then disappears immediately....
The app used to work, it started to complain about open files every so often.

Here's the output from gdb:

gdb /usr/lib/kde4/bin/ktorrent
GNU gdb 6.6-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu"...
(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /usr/lib/kde4/bin/ktorrent
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New process 25296]
(no debugging symbols found)
....
[New Thread 47820029346944 (LWP 25296)]
(no debugging symbols found)

Object::connect: No such signal kt::FileView::itemDoubleClicked(QModelIndex)
QObject::connect: Connecting from COMPAT signal (KComboBox::textChanged(QString))

Program exited normally.
(gdb)