Application that crashed: kontact
Version of the application: 4.3.3
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-14-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Crash maybe caused by some background process, since I didn't use it when it crashed. At the same time the following programs were opened:
Dolphin, Kile, firefox, okular 

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  KIO::Slave::deref (this=0x12df7b0) at ../../kio/kio/slave.cpp:242
#6  0x00007faa3862e209 in KIO::Slave::gotInput (this=0x12df7b0) at ../../kio/kio/slave.cpp:335
#7  0x00007faa3863031c in KIO::Slave::qt_metacall (this=0x12df7b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff615639a0) at ./slave.moc:76
#8  0x00007faa3a11dddc in QMetaObject::activate (sender=0xd654d0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x80790) at kernel/qobject.cpp:3113
#9  0x00007faa3854af77 in KIO::ConnectionPrivate::dequeue (this=0x1499140) at ../../kio/kio/connection.cpp:82
#10 0x00007faa3854b09d in KIO::Connection::qt_metacall (this=0xd654d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x148f460) at ./connection.moc:73
#11 0x00007faa3a1180f9 in QObject::event (this=0xd654d0, e=0xdf0180) at kernel/qobject.cpp:1111
#12 0x00007faa3aa28efc in QApplicationPrivate::notify_helper (this=0x70c3e0, receiver=0xd654d0, e=0xdf0180) at kernel/qapplication.cpp:4056
#13 0x00007faa3aa301ce in QApplication::notify (this=0x7fff61564360, receiver=0xd654d0, e=0xdf0180) at kernel/qapplication.cpp:4021
#14 0x00007faa3b65fe56 in KApplication::notify (this=0x7fff61564360, receiver=0xd654d0, event=0xdf0180) at ../../kdeui/kernel/kapplication.cpp:302
#15 0x00007faa3a108c2c in QCoreApplication::notifyInternal (this=0x7fff61564360, receiver=0xd654d0, event=0xdf0180) at kernel/qcoreapplication.cpp:610
#16 0x00007faa3a10980a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x6cc080) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x6cc080) at kernel/qcoreapplication.cpp:1247
#18 0x00007faa3a131533 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#19 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#20 0x00007faa33983bbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#21 0x00007faa33987588 in ?? () from /lib/libglib-2.0.so.0
#22 0x00007faa339876b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#23 0x00007faa3a1311a6 in QEventDispatcherGlib::processEvents (this=0x6cbcb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#24 0x00007faa3aabd4be in QGuiEventDispatcherGlib::processEvents (this=0x12df7b0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#25 0x00007faa3a107532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#26 0x00007faa3a107904 in QEventLoop::exec (this=0x7fff615642a0, flags=) at kernel/qeventloop.cpp:201
#27 0x00007faa3a109ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#28 0x0000000000403f47 in _start ()

This bug may be a duplicate of or related to bug 210843

Reported using DrKonqi