Application that crashed: kontact
Version of the application: 4.3.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-18-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Right clicking on the kmail icon in the system tray to check for new mail causes kontact to crash occasionally.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  0x00007fecccbbd7a5 in KMMainWidget::slotCheckMail (this=<value optimized out>) at ../../kmail/kmmainwidget.cpp:1045
#6  0x00007fecccbe05fd in KMMainWidget::qt_metacall (this=0x2c064d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff5a418aa0) at ./kmmainwidget.moc:355
#7  0x00007fece1dd9ddc in QMetaObject::activate (sender=0x2d9f7f0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x7fff5a418aa0) at kernel/qobject.cpp:3113
#8  0x00007fece26e30a7 in QAction::triggered (this=0x2c064d0, _t1=false) at .moc/release-shared/moc_qaction.cpp:236
#9  0x00007fece26e44ef in QAction::activate (this=0x2d9f7f0, event=<value optimized out>) at kernel/qaction.cpp:1160
#10 0x00007fece2ad0ecd in QMenuPrivate::activateCausedStack (this=<value optimized out>, causedStack=..., action=0x2d9f7f0, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:967
#11 0x00007fece2ad6dea in QMenuPrivate::activateAction (this=0x2e01960, action=0x2d9f7f0, action_e=QAction::Trigger, self=<value optimized out>) at widgets/qmenu.cpp:1060
#12 0x00007fece33f264e in KMenu::mouseReleaseEvent (this=0x2dea1a0, e=0x0) at ../../kdeui/widgets/kmenu.cpp:456
#13 0x00007fece27379c0 in QWidget::event (this=0x2dea1a0, event=0x7fff5a4194c0) at kernel/qwidget.cpp:7549
#14 0x00007fece2ad95ab in QMenu::event (this=0x2dea1a0, e=0x7fff5a4194c0) at widgets/qmenu.cpp:2353
#15 0x00007fece26e8efc in QApplicationPrivate::notify_helper (this=0x19ce780, receiver=0x2dea1a0, e=0x7fff5a4194c0) at kernel/qapplication.cpp:4056
#16 0x00007fece26f0011 in QApplication::notify (this=<value optimized out>, receiver=0x2dea1a0, e=0x7fff5a4194c0) at kernel/qapplication.cpp:3758
#17 0x00007fece331fe56 in KApplication::notify (this=0x7fff5a41b3e0, receiver=0x2dea1a0, event=0x7fff5a4194c0) at ../../kdeui/kernel/kapplication.cpp:302
#18 0x00007fece1dc4c2c in QCoreApplication::notifyInternal (this=0x7fff5a41b3e0, receiver=0x2dea1a0, event=0x7fff5a4194c0) at kernel/qcoreapplication.cpp:610
#19 0x00007fece26ef8e0 in QCoreApplication::sendSpontaneousEvent (receiver=0x2dea1a0, event=0x7fff5a4194c0, alienWidget=0x0, nativeWidget=0x2dea1a0, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#20 QApplicationPrivate::sendMouseEvent (receiver=0x2dea1a0, event=0x7fff5a4194c0, alienWidget=0x0, nativeWidget=0x2dea1a0, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>)
    at kernel/qapplication.cpp:2924
#21 0x00007fece2755e2e in QETWidget::translateMouseEvent (this=0x2dea1a0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4343
#22 0x00007fece2754aa9 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff5a41aff0) at kernel/qapplication_x11.cpp:3550
#23 0x00007fece277dd0c in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#24 0x00007fecdb63ebce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#25 0x00007fecdb642598 in ?? () from /lib/libglib-2.0.so.0
#26 0x00007fecdb6426c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#27 0x00007fece1ded1a6 in QEventDispatcherGlib::processEvents (this=0x1998cb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#28 0x00007fece277d4be in QGuiEventDispatcherGlib::processEvents (this=0x2c064d0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#29 0x00007fece1dc3532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#30 0x00007fece1dc3904 in QEventLoop::exec (this=0x7fff5a41b320, flags=) at kernel/qeventloop.cpp:201
#31 0x00007fece1dc5ab9 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