Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-16-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
1. Before the crash occurred, several reminders were posted by the KOrganizer Reminder Daemon.

2. I then edited a To Do item corresponding to one of the reminders posted by the KOrganizer Reminder Daemon.

3. I then commenced saving the edited To Do item at which time KDE Kontact
failed and the Crash Reporting Assistant was automatically invoked.

4. I was running KDE Kontact on Ubuntu Linux 9.10, 64 bit version using the
standard desktop (not the KDE Desktop). The CPU is an Intel Core 2 Duo unit.
The motherboard is model no. K5B made by Asus with 2.0 GB of memory.

5. The following applications were running on the computer system when the crash
occurred:

5.1. Gnome File Browser.
5.2. To Do function in KDE Kontact.
5.3. Gnome Text Editor.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  QHash<QObject*, QString>::findNode (this=0x2552c78, akey=<value optimized out>, ahp=0x0) at ../../include/QtCore/../../src/corelib/tools/qhash.h:857
#6  0x00007f765250db14 in QHash<QObject*, QString>::contains (this=0x2585db8, sender=0x20f27a0) at ../../include/QtCore/../../src/corelib/tools/qhash.h:847
#7  QSignalMapper::map (this=0x2585db8, sender=0x20f27a0) at kernel/qsignalmapper.cpp:267
#8  0x00007f765250dd70 in QSignalMapper::qt_metacall (this=0x2585db8, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa1170d40) at .moc/release-shared/moc_qsignalmapper.cpp:81
#9  0x00007f7652509ddc in QMetaObject::activate (sender=0x20f27a0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x20f27a0) at kernel/qobject.cpp:3113
#10 0x00007f76534168e7 in QAbstractButton::clicked (this=0x2552c78, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#11 0x00007f765317841b in QAbstractButtonPrivate::emitClicked (this=0x1c1bec0) at widgets/qabstractbutton.cpp:543
#12 0x00007f765317a02b in QAbstractButtonPrivate::click (this=0x1c1bec0) at widgets/qabstractbutton.cpp:536
#13 0x00007f765317a275 in QAbstractButton::mouseReleaseEvent (this=0x20f27a0, e=0x7fffa1171460) at widgets/qabstractbutton.cpp:1115
#14 0x00007f7652e639c0 in QWidget::event (this=0x20f27a0, event=0x7fffa1171460) at kernel/qwidget.cpp:7549
#15 0x00007f7652e14efc in QApplicationPrivate::notify_helper (this=0xf90680, receiver=0x20f27a0, e=0x7fffa1171460) at kernel/qapplication.cpp:4056
#16 0x00007f7652e1c011 in QApplication::notify (this=<value optimized out>, receiver=0x20f27a0, e=0x7fffa1171460) at kernel/qapplication.cpp:3758
#17 0x00007f7653a4bab6 in KApplication::notify (this=0x7fffa1173380, receiver=0x20f27a0, event=0x7fffa1171460) at ../../kdeui/kernel/kapplication.cpp:302
#18 0x00007f76524f4c2c in QCoreApplication::notifyInternal (this=0x7fffa1173380, receiver=0x20f27a0, event=0x7fffa1171460) at kernel/qcoreapplication.cpp:610
#19 0x00007f7652e1b8e0 in QCoreApplication::sendSpontaneousEvent (receiver=0x20f27a0, event=0x7fffa1171460, alienWidget=0x20f27a0, nativeWidget=0x2079300, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#20 QApplicationPrivate::sendMouseEvent (receiver=0x20f27a0, event=0x7fffa1171460, alienWidget=0x20f27a0, nativeWidget=0x2079300, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at kernel/qapplication.cpp:2924
#21 0x00007f7652e81a0e in QETWidget::translateMouseEvent (this=0x2079300, event=<value optimized out>) at kernel/qapplication_x11.cpp:4409
#22 0x00007f7652e80aa9 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffa1172f90) at kernel/qapplication_x11.cpp:3550
#23 0x00007f7652ea9d0c in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#24 0x00007f764bd6ebce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#25 0x00007f764bd72598 in ?? () from /lib/libglib-2.0.so.0
#26 0x00007f764bd726c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#27 0x00007f765251d1a6 in QEventDispatcherGlib::processEvents (this=0xf5ccb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#28 0x00007f7652ea94be in QGuiEventDispatcherGlib::processEvents (this=0x2552c78, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#29 0x00007f76524f3532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#30 0x00007f76524f3904 in QEventLoop::exec (this=0x7fffa11732c0, flags=) at kernel/qeventloop.cpp:201
#31 0x00007f76524f5ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#32 0x0000000000403f47 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi