Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-16-generic i686
Distribution: Ubuntu 9.04

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb715766d in KIO::Slave::deref () from /usr/lib/libkio.so.5
#7  0xb7157e5c in KIO::Slave::gotInput () from /usr/lib/libkio.so.5
#8  0xb715a2e3 in KIO::Slave::qt_metacall () from /usr/lib/libkio.so.5
#9  0xb5d791b8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0xb5d79e42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb7063a77 in KIO::Connection::readyRead () from /usr/lib/libkio.so.5
#12 0xb70653e3 in ?? () from /usr/lib/libkio.so.5
#13 0xb70657c6 in KIO::Connection::qt_metacall () from /usr/lib/libkio.so.5
#14 0xb5d728cb in QMetaCallEvent::placeMetaCall () from /usr/lib/libQtCore.so.4
#15 0xb5d743b0 in QObject::event () from /usr/lib/libQtCore.so.4
#16 0xb6227d3c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#17 0xb623003e in QApplication::notify () from /usr/lib/libQtGui.so.4
#18 0xb6e2149d in KApplication::notify () from /usr/lib/libkdeui.so.5
#19 0xb5d63bcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#20 0xb5d64825 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#21 0xb5d64a1d in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#22 0xb5d8f6af in ?? () from /usr/lib/libQtCore.so.4
#23 0xb4e34b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0xb4e380eb in ?? () from /usr/lib/libglib-2.0.so.0
#25 0xb4e38268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0xb5d8f2f8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#27 0xb62c9a75 in ?? () from /usr/lib/libQtGui.so.4
#28 0xb5d621fa in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#29 0xb5d62642 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#30 0xb5d64ae9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#31 0xb6227bb7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#32 0x0804bfef in _start ()

Reported using DrKonqi