Application that crashed: kontact
Version of the application: 4.3.5
KDE Version: 4.3.5 (KDE 4.3.5)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
program was idling in background while watching movie on dragon player and crashed on its own.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  QString (this=0x1b5ff40) at /usr/include/qt4/QtCore/qstring.h:711
#6  KCal::IncidenceBase::uid (this=0x1b5ff40) at ../../kcal/incidencebase.cpp:185
#7  0x00007fe9c5c3d1f9 in KCal::Calendar::removeRelations (this=0x1a5db60, incidence=<value optimized out>) at ../../kcal/calendar.cpp:873
#8  0x00007fe9c5c40e08 in KCal::CalendarLocal::deleteTodo (this=0x7fffe26c1210, todo=0x1b5ff40) at ../../kcal/calendarlocal.cpp:261
#9  0x00007fe9c5c958a2 in KCal::CalendarResources::deleteTodo (this=0x1a470c0, todo=0x7fe9a40069d0) at ../../kcal/calendarresources.cpp:521
#10 0x00007fe9c5c3d8a1 in KCal::Incidence::DeleteVisitor<KCal::Calendar>::visit (this=<value optimized out>, t=0x1b5ff40) at ../../kcal/incidence.h:123
#11 0x00007fe9c5c3679a in KCal::Calendar::deleteIncidence (this=0x1a470c0, incidence=0x7fe9a40069d0) at ../../kcal/calendar.cpp:438
#12 0x00007fe9a2fcf96d in EventArchiver::archiveIncidences (this=<value optimized out>, calendar=0x1a470c0, limitDate=<value optimized out>, widget=<value optimized out>, incidences=..., 
    withGUI=<value optimized out>) at ../../korganizer/eventarchiver.cpp:242
#13 0x00007fe9a2fd0268 in EventArchiver::run (this=<value optimized out>, calendar=0x1a470c0, limitDate=..., widget=0x1e8a320, withGUI=false, errorIfNone=<value optimized out>)
    at ../../korganizer/eventarchiver.cpp:121
#14 0x00007fe9a2fd0bac in EventArchiver::runAuto (this=0x7fffe26c1af0, calendar=0x1a470c0, widget=0x1e8a320, withGUI=false) at ../../korganizer/eventarchiver.cpp:72
#15 0x00007fe9a2fa81b5 in ActionManager::slotAutoArchive (this=0x1effe70) at ../../korganizer/actionmanager.cpp:2121
#16 0x00007fe9a2fb7c8d in ActionManager::qt_metacall (this=0x1effe70, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffe26c1c30) at ./actionmanager.moc:262
#17 0x00007fe9c8bfbddc in QMetaObject::activate (sender=0x1d9d7b0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1ba7880) at kernel/qobject.cpp:3113
#18 0x00007fe9c8bf5d83 in QObject::event (this=0x1d9d7b0, e=0x1b5ff40) at kernel/qobject.cpp:1075
#19 0x00007fe9c950aefc in QApplicationPrivate::notify_helper (this=0xc1af40, receiver=0x1d9d7b0, e=0x7fffe26c2230) at kernel/qapplication.cpp:4056
#20 0x00007fe9c95121ce in QApplication::notify (this=0x7fffe26c2590, receiver=0x1d9d7b0, e=0x7fffe26c2230) at kernel/qapplication.cpp:4021
#21 0x00007fe9ca141f46 in KApplication::notify (this=0x7fffe26c2590, receiver=0x1d9d7b0, event=0x7fffe26c2230) at ../../kdeui/kernel/kapplication.cpp:302
#22 0x00007fe9c8be6c2c in QCoreApplication::notifyInternal (this=0x7fffe26c2590, receiver=0x1d9d7b0, event=0x7fffe26c2230) at kernel/qcoreapplication.cpp:610
#23 0x00007fe9c8c11862 in QCoreApplication::sendEvent (this=0xc160e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#24 QTimerInfoList::activateTimers (this=0xc160e0) at kernel/qeventdispatcher_unix.cpp:572
#25 0x00007fe9c8c0f25d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#26 0x00007fe9c245ebce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#27 0x00007fe9c2462598 in ?? () from /lib/libglib-2.0.so.0
#28 0x00007fe9c24626c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#29 0x00007fe9c8c0f1a6 in QEventDispatcherGlib::processEvents (this=0xbdbcb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#30 0x00007fe9c959f4be in QGuiEventDispatcherGlib::processEvents (this=0x7fffe26c1210, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x00007fe9c8be5532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#32 0x00007fe9c8be5904 in QEventLoop::exec (this=0x7fffe26c24d0, flags=) at kernel/qeventloop.cpp:201
#33 0x00007fe9c8be7ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#34 0x0000000000403f47 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi