Application that crashed: kontact
Version of the application: 4.3.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.30-gentoo-r5 x86_64

What I was doing when the application crashed:
Kontact crashed after losing connection to IMAP server

Duplicate of bug 191589
Have not seen this for a long time, but it seems it is not fixed in Gentoo after all.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  KIO::Slave::deref (this=0x23267e0) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/slave.cpp:242
#6  0x00007f9e35b47dea in KIO::Slave::gotInput (this=0x23267e0) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/slave.cpp:335
#7  0x00007f9e35b4a0e8 in KIO::Slave::qt_metacall (this=0x23267e0, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7ffffc7db7a0)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/kio/slave.moc:76
#8  0x00007f9e33529826 in QMetaObject::activate (sender=0x226c990, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x301a340) at kernel/qobject.cpp:3101
#9  0x00007f9e35a64cdf in KIO::ConnectionPrivate::dequeue (this=0x2333e80) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/connection.cpp:82
#10 0x00007f9e35a6513a in KIO::Connection::qt_metacall (this=0x226c990, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x2bdd6e0)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/kio/connection.moc:73
#11 0x00007f9e33526451 in QObject::event (this=0x226c990, e=0x26d5fd0) at kernel/qobject.cpp:1099
#12 0x00007f9e342d98fd in QApplicationPrivate::notify_helper (this=0x1781950, receiver=0x226c990, e=0x26d5fd0) at kernel/qapplication.cpp:4065
#13 0x00007f9e342e11ba in QApplication::notify (this=0x7ffffc7dc300, receiver=0x226c990, e=0x26d5fd0) at kernel/qapplication.cpp:4030
#14 0x00007f9e35071fdb in KApplication::notify (this=0x7ffffc7dc300, receiver=0x226c990, event=0x26d5fd0)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:302
#15 0x00007f9e33517a5b in QCoreApplication::notifyInternal (this=0x7ffffc7dc300, receiver=0x226c990, event=0x26d5fd0) at kernel/qcoreapplication.cpp:606
#16 0x00007f9e335183b1 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1751230) at kernel/qcoreapplication.h:213
#17 0x00007f9e3353c7c3 in postEventSourceDispatch (s=<value optimized out>) at kernel/qcoreapplication.h:218
#18 0x00007f9e2e8e44a9 in IA__g_main_context_dispatch (context=0x1778e90) at gmain.c:1824
#19 0x00007f9e2e8e7ae8 in g_main_context_iterate (context=0x1778e90, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2455
#20 0x00007f9e2e8e7c9c in IA__g_main_context_iteration (context=0x1778e90, may_block=1) at gmain.c:2518
#21 0x00007f9e3353c45f in QEventDispatcherGlib::processEvents (this=0x1781100, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#22 0x00007f9e3435e89f in QGuiEventDispatcherGlib::processEvents (this=0x60, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#23 0x00007f9e33516442 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -58867424}) at kernel/qeventloop.cpp:149
#24 0x00007f9e335165dc in QEventLoop::exec (this=0x7ffffc7dc160, flags={i = -58867344}) at kernel/qeventloop.cpp:197
#25 0x00007f9e3351861c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#26 0x0000000000404b49 in main (argc=1, argv=0x7ffffc7dc8d8) at /var/tmp/portage/kde-base/kontact-4.3.4/work/kontact-4.3.4/kontact/src/main.cpp:218

Reported using DrKonqi