Application that crashed: kontact
Version of the application: 4.3.0 pre
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
Qt Version: 4.5.1
Operating System: Linux 2.6.30-9-generic i686
Distribution: Ubuntu karmic (development branch)

What I was doing when the application crashed:
Only where two tabs opened.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 0 (LWP 4051)]

Thread 3 (Thread 0xb0fe0b90 (LWP 4175)):
#0  0x00db1422 in __kernel_vsyscall ()
#1  0x093c0412 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x061755b4 in pthread_cond_timedwait () from /lib/tls/i686/cmov/libc.so.6
#3  0x00a0c0ef in QWaitCondition::wait (this=0xa2540f0, mutex=0xa2540ec, time=30000) at thread/qwaitcondition_unix.cpp:85
#4  0x00a00a46 in QThreadPoolThread::run (this=0xa26d480) at concurrent/qthreadpool.cpp:140
#5  0x00a0b0fe in QThreadPrivate::start (arg=0xa26d480) at thread/qthread_unix.cpp:189
#6  0x093bc4ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0x0616670e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xb17e8b90 (LWP 4176)):
#0  0x00db1422 in __kernel_vsyscall ()
#1  0x093c0412 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x061755b4 in pthread_cond_timedwait () from /lib/tls/i686/cmov/libc.so.6
#3  0x00a0c0ef in QWaitCondition::wait (this=0xa2540f0, mutex=0xa2540ec, time=30000) at thread/qwaitcondition_unix.cpp:85
#4  0x00a00a46 in QThreadPoolThread::run (this=0xaadcea8) at concurrent/qthreadpool.cpp:140
#5  0x00a0b0fe in QThreadPrivate::start (arg=0xaadcea8) at thread/qthread_unix.cpp:189
#6  0x093bc4ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0x0616670e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb805a710 (LWP 4051)):
[KCrash Handler]
#6  0x00b0dfca in QObjectPrivate::cleanConnectionLists (this=0xb5275b0) at kernel/qobject.cpp:306
#7  0x00b14023 in QMetaObject::activate (sender=0xb5796e8, from_signal_index=0, to_signal_index=1, argv=0xbfa68be8) at kernel/qobject.cpp:3155
#8  0x00b14208 in QMetaObject::activate (sender=0xb5796e8, m=0xbec1a8, from_local_signal_index=0, to_local_signal_index=1, argv=0xbfa68be8) at kernel/qobject.cpp:3214
#9  0x00b1429b in QObject::destroyed (this=0xb5796e8, _t1=0xb5796e8) at .moc/release-shared/moc_qobject.cpp:143
#10 0x00b15086 in ~QObject (this=0xb5796e8) at kernel/qobject.cpp:769
#11 0x00d43c45 in ~Part (this=0xb5796e8, __vtt_parm=0x90f4568) at ../../kparts/part.cpp:212
#12 0x00d4422a in ~ReadOnlyPart (this=0xb5796e8, __vtt_parm=0x90f4564) at ../../kparts/part.cpp:459
#13 0x08c00082 in ~KHTMLPart (this=0xb5796e8) at ../../khtml/khtml_part.cpp:625
#14 0x00b0ca25 in qDeleteInEventHandler (o=0xb5275b0) at kernel/qobject.cpp:3822
#15 0x00b0df1b in QObject::event (this=0xb5796e8, e=0xb3634b8) at kernel/qobject.cpp:1101
#16 0x00f9cc1c in QApplicationPrivate::notify_helper (this=0x9bc6f10, receiver=0xb5796e8, e=0xb3634b8) at kernel/qapplication.cpp:4057
#17 0x00fa43f4 in QApplication::notify (this=0xbfa69544, receiver=0xb5796e8, e=0xb3634b8) at kernel/qapplication.cpp:4022
#18 0x0046504a in KApplication::notify (this=0xbfa69544, receiver=0xb5796e8, event=0xb3634b8) at ../../kdeui/kernel/kapplication.cpp:302
#19 0x00afdb1b in QCoreApplication::notifyInternal (this=0xbfa69544, receiver=0xb5796e8, event=0xb3634b8) at kernel/qcoreapplication.cpp:610
#20 0x00afe5e8 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9b9c278) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#21 0x00afe7bd in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#22 0x00b2936f in postEventSourceDispatch (s=0x9bbdf20) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#23 0x021e2ad8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0x021e6070 in ?? () from /usr/lib/libglib-2.0.so.0
#25 0x021e61a3 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0x00b28f9c in QEventDispatcherGlib::processEvents (this=0x9bbc200, flags={i = 36}) at kernel/qeventdispatcher_glib.cpp:324
#27 0x0103e975 in QGuiEventDispatcherGlib::processEvents (this=0x9bbc200, flags={i = 36}) at kernel/qguieventdispatcher_glib.cpp:202
#28 0x00afc0a9 in QEventLoop::processEvents (this=0xbfa694a4, flags=) at kernel/qeventloop.cpp:149
#29 0x00afc4f2 in QEventLoop::exec (this=0xbfa694a4, flags={i = 0}) at kernel/qeventloop.cpp:200
#30 0x00afe87f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#31 0x00f9ca97 in QApplication::exec () at kernel/qapplication.cpp:3526
#32 0x0804b4d6 in _start ()

Reported using DrKonqi