Version:           2.1.3 (using KDE KDE 3.5.6)
Installed from:    Ubuntu Packages
Compiler:          Gcc 4.1.2 
OS:                Linux

When I run Ktorrent, the program crush after few seconds... this is the crash:

[KCrash handler]
#6  0xb7e5b46b in dht::ParseRsp () from /usr/lib/libktorrent-2.1.3.so
#7  0xb7e5b692 in dht::MakeRPCMsg () from /usr/lib/libktorrent-2.1.3.so
#8  0xb7e506c2 in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.3.so
#9  0xb7e5075c in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.3.so
#10 0xb7e5075c in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.3.so
#11 0xb7e5075c in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.3.so
#12 0xb7e5075c in dht::RPCServer::readPacket ()
   from /usr/lib/libktorrent-2.1.3.so
#13 0xb7e509e2 in dht::RPCServer::qt_invoke ()
   from /usr/lib/libktorrent-2.1.3.so
#14 0xb6e9588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#15 0xb6e96330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#16 0xb761f04c in KNetwork::KClientSocketBase::readyRead ()
   from /usr/lib/libkdecore.so.4
#17 0xb761f086 in KNetwork::KClientSocketBase::slotReadActivity ()
   from /usr/lib/libkdecore.so.4
#18 0xb7631143 in KNetwork::KClientSocketBase::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#19 0xb76311e6 in KNetwork::KDatagramSocket::qt_invoke ()
   from /usr/lib/libkdecore.so.4
#20 0xb6e9588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#21 0xb6e961a2 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#22 0xb7222877 in QSocketNotifier::activated () from /usr/lib/libqt-mt.so.3
#23 0xb6eb844a in QSocketNotifier::event () from /usr/lib/libqt-mt.so.3
#24 0xb6e2ca60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#25 0xb6e2e88f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#26 0xb75f0ce2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#27 0xb6dbf1e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#28 0xb6e1ee59 in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/libqt-mt.so.3
#29 0xb6dd3d07 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#30 0xb6e47136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#31 0xb6e46f46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#32 0xb6e2e609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#33 0x08065487 in ?? ()
#34 0xb6646ebc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#35 0x08064f01 in ?? ()