Version:           2.1 (using KDE KDE 3.5.6)
Installed from:    Ubuntu PackagesUbuntu Packages
OS:                Linux

The application crashes with SIGSEV 11 randomly (as far as I can make out).  It seems to have become a lot more frequent recently.  The stack trace is as follows:

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1235322224 (LWP 9025)]
[New Thread -1240147056 (LWP 9040)]
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[KCrash handler]
#6  0xb7e42b9b in dht::ParseRsp () from /usr/lib/libktorrent-2.1.so
#7  0xb7e42dc2 in dht::MakeRPCMsg () from /usr/lib/libktorrent-2.1.so
#8  0xb7e37f21 in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.so
#9  0xb7e38222 in dht::RPCServer::qt_invoke ()
   from /usr/lib/libktorrent-2.1.so
#10 0xb6e7c88b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#11 0xb6e7d330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#12 0xb760604c in KNetwork::KClientSocketBase::readyRead ()
   from /usr/lib/libkdecore.so.4
#13 0xb7606086 in KNetwork::KClientSocketBase::slotReadActivity ()
   from /usr/lib/libkdecore.so.4
#14 0xb7618143 in KNetwork::KClientSocketBase::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#15 0xb76181e6 in KNetwork::KDatagramSocket::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#16 0xb6e7c88b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#17 0xb6e7d1a2 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#18 0xb7209877 in QSocketNotifier::activated () from /usr/lib/libqt-mt.so.3
#19 0xb6e9f44a in QSocketNotifier::event () from /usr/lib/libqt-mt.so.3
#20 0xb6e13a60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#21 0xb6e1588f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#22 0xb75d7ce2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#23 0xb6da61e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#24 0xb6e05e59 in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/libqt-mt.so.3
#25 0xb6dbad07 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#26 0xb6e2e136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#27 0xb6e2df46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#28 0xb6e15609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#29 0x080653d6 in ?? ()
#30 0xb662debc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#31 0x08064ec1 in ?? ()