Application that crashed: kontact
Version of the application: 4.3.0 rc3
KDE Version: 4.2.98 (KDE 4.2.98 (KDE 4.3 RC3))
Qt Version: 4.5.2
Operating System: Linux 2.6.30-gentoo-r2 x86_64

What I was doing when the application crashed:
I guess this is duplicate but maybe the BT helps

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  KIO::Slave::deref (this=0x1f5fe70) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/slave.cpp:242
#6  0x00007fb35c4a0b26 in KIO::Slave::gotInput (this=0x1f5fe70) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/slave.cpp:335
#7  0x00007fb35c4a1c08 in KIO::Slave::qt_metacall (this=0x1f5fe70, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x7fff5c43d530)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98_build/kio/slave.moc:76
#8  0x00007fb35e05bdfd in QMetaObject::activate () from /usr/lib64/qt4/libQtCore.so.4
#9  0x00007fb35c3e696b in KIO::ConnectionPrivate::dequeue (this=0x1f51df0) at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kio/kio/connection.cpp:82
#10 0x00007fb35c3e76fa in KIO::Connection::qt_metacall (this=0x1f51e70, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0x2882260)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98_build/kio/connection.moc:73
#11 0x00007fb35e058991 in QObject::event () from /usr/lib64/qt4/libQtCore.so.4
#12 0x00007fb35e921c2d in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#13 0x00007fb35e92964a in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#14 0x00007fb35f45cbf1 in KApplication::notify (this=0x7fff5c43df70, receiver=0x1f51e70, event=0xc2ba50)
    at /var/tmp/portage/kde-base/kdelibs-4.2.98/work/kdelibs-4.2.98/kdeui/kernel/kapplication.cpp:302
#15 0x00007fb35e049cfb in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#16 0x00007fb35e04a63e in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib64/qt4/libQtCore.so.4
#17 0x00007fb35e06f203 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#18 0x00007fb357a96dd9 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#19 0x00007fb357a9a528 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#20 0x00007fb357a9a6ec in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#21 0x00007fb35e06ee9f in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#22 0x00007fb35e9a809f in QGuiEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtGui.so.4
#23 0x00007fb35e0486a2 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#24 0x00007fb35e04883c in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#25 0x00007fb35e04a8dc in QCoreApplication::exec () from /usr/lib64/qt4/libQtCore.so.4
#26 0x0000000000403f05 in main (argc=1, argv=0x7fff5c43e488) at /var/tmp/portage/kde-base/kontact-4.2.98/work/kontact-4.2.98/kontact/src/main.cpp:218

This bug may be a duplicate of or related to bug 201566

Reported using DrKonqi