Application that crashed: korganizer
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-19-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
opening a birthday and use the link to KDE-Adressbook and change anything there and comming back and use then the button show in calendar create allway this crash.

 -- Backtrace:
Application: KOrganizer (korganizer), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76ff700 (LWP 2737))]

Thread 2 (Thread 0xb2cfcb70 (LWP 2742)):
#0  0x0404d851 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#1  0x08246067 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#2  0x08219c79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#3  0x0821a0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#4  0x08127b73 in QThread::exec() () from /usr/lib/libQtCore.so.4
#5  0x081fc6ab in ?? () from /usr/lib/libQtCore.so.4
#6  0x0812ae32 in ?? () from /usr/lib/libQtCore.so.4
#7  0x0566380e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x01aef8de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb76ff700 (LWP 2737)):
[KCrash Handler]
#6  0x00a260e1 in KCal::IncidenceBase::uid() const () from /usr/lib/libkcal.so.4
#7  0x01937ee9 in KOEventViewer::showIncidenceContext() () from /usr/lib/libkorganizer_eventviewer.so.4
#8  0x01938548 in KOEventViewer::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkorganizer_eventviewer.so.4
#9  0x08231263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#10 0x08231ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x003a85d7 in KDialog::user2Clicked() () from /usr/lib/libkdeui.so.5
#12 0x003aace8 in KDialog::slotButtonClicked(int) () from /usr/lib/libkdeui.so.5
#13 0x003ad319 in KDialog::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdeui.so.5
#14 0x0193a632 in KOEventViewerDialog::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkorganizer_eventviewer.so.4
#15 0x08231263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x08231ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x08233e73 in QSignalMapper::mapped(int) () from /usr/lib/libQtCore.so.4
#18 0x0823470d in QSignalMapper::map(QObject*) () from /usr/lib/libQtCore.so.4
#19 0x082348ee in QSignalMapper::map() () from /usr/lib/libQtCore.so.4
#20 0x0823512b in QSignalMapper::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtCore.so.4
#21 0x08231263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#22 0x082316d8 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/libQtCore.so.4
#23 0x0163ecc1 in QAbstractButton::clicked(bool) () from /usr/lib/libQtGui.so.4
#24 0x01367549 in ?? () from /usr/lib/libQtGui.so.4
#25 0x013691a4 in ?? () from /usr/lib/libQtGui.so.4
#26 0x01369431 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#27 0x01007012 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#28 0x013673ee in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#29 0x0141166d in QPushButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#30 0x00fb1f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#31 0x00fba033 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#32 0x00443bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#33 0x0821b6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#34 0x00fb8f6e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#35 0x010277c0 in ?? () from /usr/lib/libQtGui.so.4
#36 0x01026c4b in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#37 0x01053502 in ?? () from /usr/lib/libQtGui.so.4
#38 0x04049e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#39 0x0404d730 in ?? () from /lib/libglib-2.0.so.0
#40 0x0404d863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#41 0x0824602c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#42 0x01052be5 in ?? () from /usr/lib/libQtGui.so.4
#43 0x08219c79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#44 0x0821a0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#45 0x0821c53f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#46 0x00fb1dd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#47 0x0804ec04 in _start ()

Reported using DrKonqi