Application: kontact (4.4 pre)
KDE Version: 4.3.67 (KDE 4.3.67 (KDE 4.4 >= 20090904)) "release 16"
Qt Version: 4.5.2
Operating System: Linux 2.6.31-rc9-7-desktop i686
Distribution: "openSUSE 11.2 Milestone 7 (i586)"

What I was doing when the application crashed:
Mostly can be repeated by browsing kde-look.org and viewing screen shot. If you press a picture that is supposed to close a preview window - whole Kontact crashes.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb7786349 in QObjectPrivate::cleanConnectionLists (this=0xa350778) at kernel/qobject.cpp:306
#7  0xb778c600 in QMetaObject::activate (sender=0x8f7b688, from_signal_index=0, to_signal_index=1, argv=0xbffaf188) at kernel/qobject.cpp:3148
#8  0xb778c801 in QMetaObject::activate (sender=0x8f7b688, m=0xb78641a8, from_local_signal_index=0, to_local_signal_index=1, argv=0xbffaf188) at kernel/qobject.cpp:3207
#9  0xb778c89d in QObject::destroyed (this=0x8f7b688, _t1=0x8f7b688) at .moc/release-shared/moc_qobject.cpp:143
#10 0xb778d6e7 in QObject::~QObject (this=0x8f7b688, __in_chrg=<value optimized out>) at kernel/qobject.cpp:757
#11 0xb6a1ece3 in KParts::Part::~Part() () from /usr/lib/libkparts.so.4
#12 0xb6a1f4bc in KParts::ReadOnlyPart::~ReadOnlyPart() () from /usr/lib/libkparts.so.4
#13 0xb646d90f in KHTMLPart::~KHTMLPart() () from /usr/lib/libkhtml.so.5
#14 0xb7784d13 in qDeleteInEventHandler (o=0xa350778) at kernel/qobject.cpp:3815
#15 0xb7786287 in QObject::event (this=0x8f7b688, e=0xa6a0050) at kernel/qobject.cpp:1094
#16 0xb6dba94c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0xb6dc239e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#18 0xb7cc7ee1 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#19 0xb7775e3e in QCoreApplication::notifyInternal (this=0xbffafa34, receiver=0x8f7b688, event=0xa6a0050) at kernel/qcoreapplication.cpp:610
#20 0xb7776aac in sendEvent (event=<value optimized out>, receiver=<value optimized out>) at kernel/qcoreapplication.h:213
#21 QCoreApplicationPrivate::sendPostedEvents (event=<value optimized out>, receiver=<value optimized out>) at kernel/qcoreapplication.cpp:1247
#22 0xb7776c6c in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#23 0xb77a1e9d in sendPostedEvents () at kernel/qcoreapplication.h:218
#24 postEventSourceDispatch () at kernel/qeventdispatcher_glib.cpp:210
#25 0xb4f03442 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#26 0xb4f06d18 in ?? () from /usr/lib/libglib-2.0.so.0
#27 0xb4f06e3e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#28 0xb77a1aa8 in QEventDispatcherGlib::processEvents (this=0x8073ab8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#29 0xb6e5c23a in ?? () from /usr/lib/libQtGui.so.4
#30 0xb777445d in QEventLoop::processEvents (this=0xbffaf994, flags=) at kernel/qeventloop.cpp:149
#31 0xb77748a9 in QEventLoop::exec (this=0xbffaf994, flags=...) at kernel/qeventloop.cpp:201
#32 0xb7776d40 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0xb6dba7c4 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#34 0x0804b726 in _start ()

Reported using DrKonqi