Version:           2.1 (using KDE 3.5.6, Kubuntu (feisty) 4:3.5.6-0ubuntu14.1)
Compiler:          Target: x86_64-linux-gnu
OS:                Linux (x86_64) release 2.6.20-16-generic

KTorrent crashes daily, sometimes when I'm in it, sometimes in background.  I can't reproduce it, it seems totally random to me... as a total linux n00b.  
It always gives the message about "the signal 11 (SIGSEGV)".  Backtrace:

(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(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 Thread 47828492204032 (LWP 21828)]
[New Thread 1082132800 (LWP 21842)]
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
[KCrash handler]
#5  0x00002b7fe92b1c1e in dht::ParseRsp () from /usr/lib/libktorrent-2.1.so
#6  0x00002b7fe92b286b in dht::MakeRPCMsg () from /usr/lib/libktorrent-2.1.so
#7  0x00002b7fe92a9399 in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.so
#8  0x00002b7fe92a963d in dht::RPCServer::qt_invoke ()
   from /usr/lib/libktorrent-2.1.so
#9  0x00002b7febe6ece2 in QObject::activate_signal ()
   from /usr/lib/libqt-mt.so.3
#10 0x00002b7febe6f87c in QObject::activate_signal ()
   from /usr/lib/libqt-mt.so.3
#11 0x00002b7feabd6fdf in KNetwork::KClientSocketBase::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#12 0x00002b7feabd707b in KNetwork::KDatagramSocket::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#13 0x00002b7febe6ece2 in QObject::activate_signal ()
   from /usr/lib/libqt-mt.so.3
#14 0x00002b7febe6f6d3 in QObject::activate_signal ()
   from /usr/lib/libqt-mt.so.3
#15 0x00002b7fec1dd79c in QSocketNotifier::activated ()
   from /usr/lib/libqt-mt.so.3
#16 0x00002b7febe90640 in QSocketNotifier::event ()
   from /usr/lib/libqt-mt.so.3
#17 0x00002b7febe0a1d6 in QApplication::internalNotify ()
   from /usr/lib/libqt-mt.so.3
#18 0x00002b7febe0bf65 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#19 0x00002b7feab9f378 in KApplication::notify ()
   from /usr/lib/libkdecore.so.4
#20 0x00002b7febd9ccc2 in QApplication::sendEvent ()
   from /usr/lib/libqt-mt.so.3
#21 0x00002b7febdfcdef in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/libqt-mt.so.3
#22 0x00002b7febdb13d0 in QEventLoop::processEvents ()
   from /usr/lib/libqt-mt.so.3
#23 0x00002b7febe2370b in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#24 0x00002b7febe23513 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#25 0x00002b7febe0bc9c in QApplication::exec () from /usr/lib/libqt-mt.so.3
#26 0x0000000000424dc8 in ?? ()
#27 0x00002b7fef9348e4 in __libc_start_main () from /lib/libc.so.6
#28 0x0000000000424a09 in ?? ()
#29 0x00007fffc2011b48 in ?? ()
#30 0x0000000000000000 in ?? ()