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 2.6.31-14-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Very simple. I have a calender through FTP, I would get a message that stated that it was unable to be edited because it was in use by another process when I tried to edit it, and then it crashed. After which I got graphical glitches which may be unrelated, and had to restart.

 -- Backtrace:
Application: KOrganizer (korganizer), signal: Segmentation fault
[KCrash Handler]
#6  0x0014e0dc in KCal::IncidenceBase::uid() const () from /usr/lib/libkcal.so.4
#7  0x086f9419 in KOEventViewer::changeIncidenceDisplay(KCal::Incidence*, int) () from /usr/lib/libkorganizer_eventviewer.so.4
#8  0x0055646e in CalendarView::changeIncidenceDisplay(KCal::Incidence*, int) () from /usr/lib/libkorganizerprivate.so.4
#9  0x0056093c in CalendarView::incidenceChanged(KCal::Incidence*, KCal::Incidence*, int) () from /usr/lib/libkorganizerprivate.so.4
#10 0x005678e4 in CalendarView::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkorganizerprivate.so.4
#11 0x05602263 in QMetaObject::activate (sender=0x8b62530, from_signal_index=5, to_signal_index=5, argv=0xbfc50b40) at kernel/qobject.cpp:3113
#12 0x05602ec2 in QMetaObject::activate (sender=0x8b62530, m=0x39be1c, local_signal_index=1, argv=0xbfc50b40) at kernel/qobject.cpp:3187
#13 0x0039a1cf in KOrg::IncidenceChangerBase::incidenceChanged(KCal::Incidence*, KCal::Incidence*, int) () from /usr/lib/libkorganizer_interfaces.so.4
#14 0x0060062c in IncidenceChanger::changeIncidence(KCal::Incidence*, KCal::Incidence*, int) () from /usr/lib/libkorganizerprivate.so.4
#15 0x005388e4 in ?? () from /usr/lib/libkorganizerprivate.so.4
#16 0x0053a9be in ?? () from /usr/lib/libkorganizerprivate.so.4
#17 0x05602263 in QMetaObject::activate (sender=0x8ed0388, from_signal_index=29, to_signal_index=29, argv=0xbfc50d98) at kernel/qobject.cpp:3113
#18 0x05602ec2 in QMetaObject::activate (sender=0x8ed0388, m=0x1549048, local_signal_index=2, argv=0xbfc50d98) at kernel/qobject.cpp:3187
#19 0x011282c3 in QMenu::triggered (this=0x8ed0388, _t1=0x8ed1128) at .moc/release-shared/moc_qmenu.cpp:158
#20 0x01129aac in QMenuPrivate::_q_actionTriggered (this=0x8ed03a0) at widgets/qmenu.cpp:1088
#21 0x01132846 in QMenu::qt_metacall (this=0x8ed0388, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfc50f78) at .moc/release-shared/moc_qmenu.cpp:99
#22 0x05602263 in QMetaObject::activate (sender=0x8ed1128, from_signal_index=5, to_signal_index=6, argv=0xbfc50f78) at kernel/qobject.cpp:3113
#23 0x056026d8 in QMetaObject::activate (sender=0x8ed1128, m=0x1542e48, from_local_signal_index=1, to_local_signal_index=2, argv=0xbfc50f78) at kernel/qobject.cpp:3207
#24 0x00cda9b1 in QAction::triggered (this=0x8ed1128, _t1=false) at .moc/release-shared/moc_qaction.cpp:236
#25 0x00cdbf32 in QAction::activate (this=0x8ed1128, event=QAction::Trigger) at kernel/qaction.cpp:1160
#26 0x011299cc in QMenuPrivate::activateCausedStack (this=0x8ed03a0, causedStack=..., action=0x8ed1128, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:967
#27 0x0113003b in QMenuPrivate::activateAction (this=0x8ed03a0, action=0x8ed1128, action_e=QAction::Trigger, self=<value optimized out>) at widgets/qmenu.cpp:1060
#28 0x01130bf7 in QMenu::mouseReleaseEvent (this=0x8ed0388, e=0xbfc51620) at widgets/qmenu.cpp:2254
#29 0x00d36012 in QWidget::event (this=0x8ed0388, event=0xbfc51620) at kernel/qwidget.cpp:7549
#30 0x01132e34 in QMenu::event (this=0x8ed0388, e=0xbfc51620) at widgets/qmenu.cpp:2353
#31 0x00ce0f54 in QApplicationPrivate::notify_helper (this=0x88fd460, receiver=0x8ed0388, e=0xbfc51620) at kernel/qapplication.cpp:4056
#32 0x00ce9033 in QApplication::notify (this=0xbfc52fd4, receiver=0x8ed0388, e=0xbfc51620) at kernel/qapplication.cpp:3758
#33 0x009adbfa in KApplication::notify (this=0xbfc52fd4, receiver=0x8ed0388, event=0xbfc51620) at ../../kdeui/kernel/kapplication.cpp:302
#34 0x055ec6cb in QCoreApplication::notifyInternal (this=0xbfc52fd4, receiver=0x8ed0388, event=0xbfc51620) at kernel/qcoreapplication.cpp:610
#35 0x00ce7f6e in QCoreApplication::sendSpontaneousEvent (receiver=0x8ed0388, event=0xbfc51620, alienWidget=0x0, nativeWidget=0x8ed0388, buttonDown=0x155baa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#36 QApplicationPrivate::sendMouseEvent (receiver=0x8ed0388, event=0xbfc51620, alienWidget=0x0, nativeWidget=0x8ed0388, buttonDown=0x155baa0, lastMouseReceiver=...) at kernel/qapplication.cpp:2924
#37 0x00d56c87 in QETWidget::translateMouseEvent (this=0x8ed0388, event=0xbfc52c6c) at kernel/qapplication_x11.cpp:4343
#38 0x00d55c4b in QApplication::x11ProcessEvent (this=0xbfc52fd4, event=0xbfc52c6c) at kernel/qapplication_x11.cpp:3428
#39 0x00d82502 in x11EventSourceDispatch (s=0x88f0468, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#40 0x01615e78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#41 0x01619720 in ?? () from /lib/libglib-2.0.so.0
#42 0x01619853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#43 0x0561702c in QEventDispatcherGlib::processEvents (this=0x88cd9f8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#44 0x00d81be5 in QGuiEventDispatcherGlib::processEvents (this=0x88cd9f8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#45 0x055eac79 in QEventLoop::processEvents (this=0xbfc52f64, flags=) at kernel/qeventloop.cpp:149
#46 0x055eb0ca in QEventLoop::exec (this=0xbfc52f64, flags=...) at kernel/qeventloop.cpp:201
#47 0x055ed53f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#48 0x00ce0dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#49 0x0804ec04 in _start ()

Reported using DrKonqi