Application: kontact (4.9.2)
KDE Platform Version: 4.9.2 "release 511"
Qt Version: 4.8.3
Operating System: Linux 3.1.10-1.16-desktop x86_64
Distribution: "openSUSE 12.1 (x86_64)"

-- Information about the crash:
I have had Kontact running for the better part of 6 hours.  I left for an appointment.  When I returned I had this crash message.  It has happened three days in a row, hence my answer that it happens ever time.

The crash can be reproduced every time.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe639a77760 (LWP 26698))]

Thread 3 (Thread 0x7fe621558700 (LWP 26699)):
#0  0x00007fe6317aee6c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fe636235f52 in ?? () from /usr/lib64/libQtWebKit.so.4
#2  0x00007fe636235f89 in ?? () from /usr/lib64/libQtWebKit.so.4
#3  0x00007fe6317aaf05 in start_thread () from /lib64/libpthread.so.0
#4  0x00007fe636f7a10d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fe620c3f700 (LWP 26700)):
[KCrash Handler]
#6  0x00007fe636f15ed1 in _int_free () from /lib64/libc.so.6
#7  0x00007fe637605882 in QString::free (d=0x882ef0) at tools/qstring.cpp:1235
#8  0x00007fe633fa3699 in ~QString (this=0xa2d5700, __in_chrg=<optimized out>) at ../../src/corelib/tools/qstring.h:880
#9  QDBusMessagePrivate::~QDBusMessagePrivate (this=0xa2d56e0, __in_chrg=<optimized out>) at qdbusmessage.cpp:72
#10 0x00007fe633fa37af in ~QDBusMessage (this=<optimized out>, __in_chrg=<optimized out>) at qdbusmessage.cpp:537
#11 QDBusMessage::~QDBusMessage (this=<optimized out>, __in_chrg=<optimized out>) at qdbusmessage.cpp:534
#12 0x00007fe633f9fc04 in ~QDBusCallDeliveryEvent (this=0x9a7d340, __in_chrg=<optimized out>) at qdbusintegrator_p.h:93
#13 QDBusCallDeliveryEvent::~QDBusCallDeliveryEvent (this=0x9a7d340, __in_chrg=<optimized out>) at qdbusintegrator_p.h:93
#14 0x00007fe6376beee3 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x64c0b0) at kernel/qcoreapplication.cpp:1555
#15 0x00007fe6376ea1d3 in sendPostedEvents () at kernel/qcoreapplication.h:236
#16 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:279
#17 0x00007fe63129b5dd in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#18 0x00007fe63129bdd8 in ?? () from /usr/lib64/libglib-2.0.so.0
#19 0x00007fe63129bfa9 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#20 0x00007fe6376ea5ff in QEventDispatcherGlib::processEvents (this=0x7fe61c0008c0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#21 0x00007fe6376ba162 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#22 0x00007fe6376ba3b7 in QEventLoop::exec (this=0x7fe620c3ee00, flags=...) at kernel/qeventloop.cpp:204
#23 0x00007fe6375b8687 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#24 0x00007fe6375bb6ec in QThreadPrivate::start (arg=0x64bf20) at thread/qthread_unix.cpp:338
#25 0x00007fe6317aaf05 in start_thread () from /lib64/libpthread.so.0
#26 0x00007fe636f7a10d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fe639a77760 (LWP 26698)):
#0  0x00007fe636f8730e in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x00007fe636f1b7f1 in _L_lock_9946 () from /lib64/libc.so.6
#2  0x00007fe636f19830 in malloc () from /lib64/libc.so.6
#3  0x00007fe6398bd4a9 in _dl_map_object_deps () from /lib64/ld-linux-x86-64.so.2
#4  0x00007fe6398c2c88 in dl_open_worker () from /lib64/ld-linux-x86-64.so.2
#5  0x00007fe6398bec36 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2
#6  0x00007fe6398c27ca in _dl_open () from /lib64/ld-linux-x86-64.so.2
#7  0x00007fe636fb1410 in do_dlopen () from /lib64/libc.so.6
#8  0x00007fe6398bec36 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2
#9  0x00007fe636fb14af in dlerror_run () from /lib64/libc.so.6
#10 0x00007fe636fb1517 in __libc_dlopen_mode () from /lib64/libc.so.6
#11 0x00007fe636f8c8e5 in init () from /lib64/libc.so.6
#12 0x00007fe6317b03d3 in pthread_once () from /lib64/libpthread.so.0
#13 0x00007fe636f8ca04 in backtrace () from /lib64/libc.so.6
#14 0x00007fe636f0f9af in __libc_message () from /lib64/libc.so.6
#15 0x00007fe636f156d6 in malloc_printerr () from /lib64/libc.so.6
#16 0x00007fe636f17a41 in _int_malloc () from /lib64/libc.so.6
#17 0x00007fe636f1983e in malloc () from /lib64/libc.so.6
#18 0x00007fe637600dd5 in QString::QString (this=0x7fff5a525ca0, size=18) at tools/qstring.cpp:1141
#19 0x00007fe6376f3bd8 in QUtf8::convertToUnicode (chars=<optimized out>, len=17, state=0x0) at codecs/qutfcodec.cpp:183
#20 0x00007fe6376031ab in QString::fromUtf8 (str=<optimized out>, size=<optimized out>) at tools/qstring.cpp:4020
#21 0x00007fe633fa3be1 in QDBusMessagePrivate::fromDBusMessage (dmsg=0x5e5d140, capabilities=...) at qdbusmessage.cpp:237
#22 0x00007fe633f9e02c in qDBusSignalFilter (connection=<optimized out>, message=<optimized out>, data=0x884900) at qdbusintegrator.cpp:543
#23 0x00007fe62c07e2d6 in dbus_connection_dispatch () from /lib64/libdbus-1.so.3
#24 0x00007fe633f91349 in q_dbus_connection_dispatch (connection=<optimized out>) at qdbus_symbols_p.h:115
#25 QDBusConnectionPrivate::doDispatch (this=0x884900) at qdbusintegrator.cpp:1129
#26 0x00007fe633f95315 in QDBusConnectionPrivate::socketRead (this=0x884900, fd=<optimized out>) at qdbusintegrator.cpp:1149
#27 0x00007fe6376cf511 in QMetaObject::activate (sender=0x884080, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff5a525fd0) at kernel/qobject.cpp:3556
#28 0x00007fe63771cb3e in QSocketNotifier::activated (this=<optimized out>, _t1=10) at .moc/release-shared/moc_qsocketnotifier.cpp:103
#29 0x00007fe6376d87fb in QSocketNotifier::event (this=0x884080, e=0x7fff5a526640) at kernel/qsocketnotifier.cpp:317
#30 0x00007fe6380d50e4 in notify_helper (e=0x7fff5a526640, receiver=0x884080, this=0x644b00) at kernel/qapplication.cpp:4557
#31 QApplicationPrivate::notify_helper (this=0x644b00, receiver=0x884080, e=0x7fff5a526640) at kernel/qapplication.cpp:4529
#32 0x00007fe6380d9eb3 in QApplication::notify (this=0x7fff5a5268f0, receiver=0x884080, e=0x7fff5a526640) at kernel/qapplication.cpp:4418
#33 0x00007fe638e1a506 in KApplication::notify (this=0x7fff5a5268f0, receiver=0x884080, event=0x7fff5a526640) at /usr/src/debug/kdelibs-4.9.2/kdeui/kernel/kapplication.cpp:311
#34 0x00007fe6376bb62c in QCoreApplication::notifyInternal (this=0x7fff5a5268f0, receiver=0x884080, event=0x7fff5a526640) at kernel/qcoreapplication.cpp:915
#35 0x00007fe6376e9c57 in sendEvent (event=0x7fff5a526640, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#36 socketNotifierSourceDispatch (source=0x646a40) at kernel/qeventdispatcher_glib.cpp:110
#37 0x00007fe63129b5dd in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#38 0x00007fe63129bdd8 in ?? () from /usr/lib64/libglib-2.0.so.0
#39 0x00007fe63129bfa9 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#40 0x00007fe6376ea5ff in QEventDispatcherGlib::processEvents (this=0x60d110, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#41 0x00007fe63817891e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#42 0x00007fe6376ba162 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#43 0x00007fe6376ba3b7 in QEventLoop::exec (this=0x7fff5a526880, flags=...) at kernel/qeventloop.cpp:204
#44 0x00007fe6376bf1d5 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#45 0x00000000004038c9 in ?? ()
#46 0x00007fe636ec023d in __libc_start_main () from /lib64/libc.so.6
#47 0x0000000000403e31 in _start ()

Reported using DrKonqi