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 2.6.31-15-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was editing a ToDo item and clicked OK to save it when Kontact crashed.
Also using GCaldaemon like the suggested duplicate.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0x00000049 in ?? ()
#7  0x02e35939 in KOIncidenceEditor::slotButtonClicked (this=0x91defb0, button=4) at ../../korganizer/koincidenceeditor.cpp:102
#8  0x0057d369 in KDialog::qt_metacall (this=0x91defb0, _c=QMetaObject::InvokeMetaMethod, _id=33, _a=0xbfab01d8) at ./kdialog.moc:184
#9  0x006451ba in KPageDialog::qt_metacall (this=0x91defb0, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfab01d8) at ./kpagedialog.moc:64
#10 0x02e368fa in KOIncidenceEditor::qt_metacall (this=0x91defb0, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfab01d8) at ./koincidenceeditor.moc:107
#11 0x02e39e1a in KOTodoEditor::qt_metacall (this=0x91defb0, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfab01d8) at ./kotodoeditor.moc:65
#12 0x07db5263 in QMetaObject::activate (sender=0x93072d0, from_signal_index=4, to_signal_index=4, argv=0xbfab01d8) at kernel/qobject.cpp:3113
#13 0x07db5ec2 in QMetaObject::activate (sender=0x93072d0, m=0x7e8f878, local_signal_index=0, argv=0xbfab01d8) at kernel/qobject.cpp:3187
#14 0x07db7e73 in QSignalMapper::mapped (this=0x93072d0, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#15 0x07db870d in QSignalMapper::map (this=0x93072d0, sender=0x8e37508) at kernel/qsignalmapper.cpp:266
#16 0x07db88ee in QSignalMapper::map (this=0x93072d0) at kernel/qsignalmapper.cpp:257
#17 0x07db912b in QSignalMapper::qt_metacall (this=0x93072d0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfab03a8) at .moc/release-shared/moc_qsignalmapper.cpp:81
#18 0x07db5263 in QMetaObject::activate (sender=0x8e37508, from_signal_index=29, to_signal_index=30, argv=0xbfab03a8) at kernel/qobject.cpp:3113
#19 0x07db56d8 in QMetaObject::activate (sender=0x8e37508, m=0x16ce0a4, from_local_signal_index=2, to_local_signal_index=3, argv=0xbfab03a8) at kernel/qobject.cpp:3207
#20 0x014e7cc1 in QAbstractButton::clicked (this=0x8e37508, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#21 0x01210549 in QAbstractButtonPrivate::emitClicked (this=0x92248b0) at widgets/qabstractbutton.cpp:543
#22 0x012121a4 in QAbstractButtonPrivate::click (this=0x92248b0) at widgets/qabstractbutton.cpp:536
#23 0x01212431 in QAbstractButton::mouseReleaseEvent (this=0x8e37508, e=0xbfab09a0) at widgets/qabstractbutton.cpp:1115
#24 0x00eb0012 in QWidget::event (this=0x8e37508, event=0xbfab09a0) at kernel/qwidget.cpp:7549
#25 0x012103ee in QAbstractButton::event (this=0x8e37508, e=0x9351790) at widgets/qabstractbutton.cpp:1077
#26 0x012ba66d in QPushButton::event (this=0x8e37508, e=0xbfab09a0) at widgets/qpushbutton.cpp:662
#27 0x00e5af54 in QApplicationPrivate::notify_helper (this=0x84c7938, receiver=0x8e37508, e=0xbfab09a0) at kernel/qapplication.cpp:4056
#28 0x00e63033 in QApplication::notify (this=0xbfab21c4, receiver=0x8e37508, e=0xbfab09a0) at kernel/qapplication.cpp:3758
#29 0x0061414a in KApplication::notify (this=0xbfab21c4, receiver=0x8e37508, event=0xbfab09a0) at ../../kdeui/kernel/kapplication.cpp:302
#30 0x07d9f6cb in QCoreApplication::notifyInternal (this=0xbfab21c4, receiver=0x8e37508, event=0xbfab09a0) at kernel/qcoreapplication.cpp:610
#31 0x00e61f6e in QCoreApplication::sendSpontaneousEvent (receiver=0x8e37508, event=0xbfab09a0, alienWidget=0x8e37508, nativeWidget=0x91defb0, buttonDown=0x16d5aa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#32 QApplicationPrivate::sendMouseEvent (receiver=0x8e37508, event=0xbfab09a0, alienWidget=0x8e37508, nativeWidget=0x91defb0, buttonDown=0x16d5aa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#33 0x00ed07c0 in QETWidget::translateMouseEvent (this=0x91defb0, event=0xbfab1fec) at kernel/qapplication_x11.cpp:4409
#34 0x00ecfc4b in QApplication::x11ProcessEvent (this=0xbfab21c4, event=0xbfab1fec) at kernel/qapplication_x11.cpp:3428
#35 0x00efd050 in QEventDispatcherX11::processEvents (this=0x84999f8, flags=...) at kernel/qeventdispatcher_x11.cpp:132
#36 0x07d9dc79 in QEventLoop::processEvents (this=0xbfab2124, flags=) at kernel/qeventloop.cpp:149
#37 0x07d9e0ca in QEventLoop::exec (this=0xbfab2124, flags=...) at kernel/qeventloop.cpp:201
#38 0x07da053f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#39 0x00e5add7 in QApplication::exec () at kernel/qapplication.cpp:3525
#40 0x0804b4e6 in main (argc=1, argv=0xbfab23e4) at ../../../kontact/src/main.cpp:218

This bug may be a duplicate of or related to bug 179714

Reported using DrKonqi