Version:           2.1.3 (using KDE KDE 3.5.5)
Installed from:    Gentoo Packages
Compiler:          GCC 4.1.1 
OS:                Linux

I am running KTorrent in GNOME with the system tray icon turned on.
KTorrent randomally crashes. I don't have to be doing anything in particular for it to crash. It may be me but I think it is happening more often than usual.
It mostly crashes when it's minimised to the system tray but it has also crashed when the main window was in focus. Sometimes it can be running for hours before it crashes and sometimes it can only be running for a matter of minutes. When it crashes, the program disappears and the crash notification window pops up with this bug report:

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Using host libthread_db library "/lib/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1234590032 (LWP 2110)]
[New Thread -1253217392 (LWP 2135)]
[New Thread -1244824688 (LWP 2134)]
[KCrash handler]
#6  0xb7e412eb in dht::ParseRsp () from /usr/lib/libktorrent-2.1.3.so
#7  0xb7e41522 in dht::MakeRPCMsg () from /usr/lib/libktorrent-2.1.3.so
#8  0xb7e36d61 in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.3.so
#9  0xb7e37082 in dht::RPCServer::qt_invoke ()
   from /usr/lib/libktorrent-2.1.3.so
#10 0xb6f283d9 in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#11 0xb6f2902d in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#12 0xb765aaac in KNetwork::KClientSocketBase::readyRead ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#13 0xb765aae6 in KNetwork::KClientSocketBase::slotReadActivity ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#14 0xb765aef5 in KNetwork::KClientSocketBase::qt_invoke ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#15 0xb765f764 in KNetwork::KDatagramSocket::qt_invoke ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#16 0xb6f283d9 in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#17 0xb6f28f22 in QObject::activate_signal () from /usr/qt/3/lib/libqt-mt.so.3
#18 0xb72631b0 in QSocketNotifier::activated ()
   from /usr/qt/3/lib/libqt-mt.so.3
#19 0xb6f464d0 in QSocketNotifier::event () from /usr/qt/3/lib/libqt-mt.so.3
#20 0xb6ec8d07 in QApplication::internalNotify ()
   from /usr/qt/3/lib/libqt-mt.so.3
#21 0xb6ec98c1 in QApplication::notify () from /usr/qt/3/lib/libqt-mt.so.3
#22 0xb75216ee in KApplication::notify ()
   from /usr/kde/3.5/lib/libkdecore.so.4
#23 0xb6ebd951 in QEventLoop::activateSocketNotifiers ()
   from /usr/qt/3/lib/libqt-mt.so.3
#24 0xb6e7891e in QEventLoop::processEvents ()
   from /usr/qt/3/lib/libqt-mt.so.3
#25 0xb6edf831 in QEventLoop::enterLoop () from /usr/qt/3/lib/libqt-mt.so.3
#26 0xb6edf6b6 in QEventLoop::exec () from /usr/qt/3/lib/libqt-mt.so.3
#27 0xb6ec878f in QApplication::exec () from /usr/qt/3/lib/libqt-mt.so.3
#28 0x08063e76 in ?? ()
#29 0xb66b3838 in __libc_start_main () from /lib/libc.so.6
#30 0x08063911 in ?? ()