Application that crashed: kontact
Version of the application: 4.3.0 rc2
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-12-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I switched from my local inbox to the inbox of another account. Just after I switched, kontact crashed. This account was a DIMAP account. 

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  KMail::MessageListView::Widget::getSelectionStats (this=0xab4e390, selectedSernums=@0xbf88e988, selectedVisibleSernums=@0xbf88e984, allSelectedBelongToSameThread=0xbf88e98f, 
    includeCollapsedChildren=<value optimized out>) at /build/buildd/kdepim-4.2.96/kmail/messagelistview/widget.cpp:580
#7  0xb126e706 in KMail::MessageListView::Pane::getSelectionStats (this=0xab4fb28, selectedSernums=@0xbf88e988, selectedVisibleSernums=@0xbf88e984, allSelectedBelongToSameThread=0xbf88e98f, 
    includeCollapsedChildren=<value optimized out>) at /build/buildd/kdepim-4.2.96/kmail/messagelistview/pane.cpp:621
#8  0xb111ee97 in KMMainWidget::updateMessageActions (this=0xa922090) at /build/buildd/kdepim-4.2.96/kmail/kmmainwidget.cpp:4278
#9  0xb113a118 in KMMainWidget::qt_metacall (this=0xa922090, _c=QMetaObject::InvokeMetaMethod, _id=20, _a=0xbf88ea58) at /build/buildd/kdepim-4.2.96/obj-i486-linux-gnu/kmail/kmmainwidget.moc:366
#10 0xb5cacca8 in QMetaObject::activate (sender=0xb2a1f70, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3069
#11 0xb5cad932 in QMetaObject::activate (sender=0xb2a1f70, m=0xb5d89904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3143
#12 0xb5ce8717 in QTimer::timeout (this=0xb2a1f70) at .moc/release-shared/moc_qtimer.cpp:128
#13 0xb5cb26fe in QTimer::timerEvent (this=0xb2a1f70, e=0xbf88eedc) at kernel/qtimer.cpp:261
#14 0xb5ca715f in QObject::event (this=0xb2a1f70, e=0xbf88eedc) at kernel/qobject.cpp:1082
#15 0xb6177e9c in QApplicationPrivate::notify_helper (this=0xa0682b0, receiver=0xb2a1f70, e=0xbf88eedc) at kernel/qapplication.cpp:4084
#16 0xb618019e in QApplication::notify (this=0xbf88f188, receiver=0xb2a1f70, e=0xbf88eedc) at kernel/qapplication.cpp:3631
#17 0xb6d9e4dd in KApplication::notify (this=0xbf88f188, receiver=0xb2a1f70, event=0xbf88eedc) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#18 0xb5c96a3b in QCoreApplication::notifyInternal (this=0xbf88f188, receiver=0xb2a1f70, event=0xbf88eedc) at kernel/qcoreapplication.cpp:602
#19 0xb5cc5d71 in QTimerInfoList::activateTimers (this=0xa06a2b4) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#20 0xb5cc24e0 in timerSourceDispatch (source=0xa06a280) at kernel/qeventdispatcher_glib.cpp:164
#21 0xb4d5bb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0xb4d5f0eb in ?? () from /usr/lib/libglib-2.0.so.0
#23 0xb4d5f268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#24 0xb5cc2438 in QEventDispatcherGlib::processEvents (this=0xa040028, flags={i = -1081544616}) at kernel/qeventdispatcher_glib.cpp:323
#25 0xb6219365 in QGuiEventDispatcherGlib::processEvents (this=0xa040028, flags={i = -1081544568}) at kernel/qguieventdispatcher_glib.cpp:202
#26 0xb5c9506a in QEventLoop::processEvents (this=0xbf88f100, flags={i = -1081544504}) at kernel/qeventloop.cpp:149
#27 0xb5c954aa in QEventLoop::exec (this=0xbf88f100, flags={i = -1081544440}) at kernel/qeventloop.cpp:200
#28 0xb5c97959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#29 0xb6177d17 in QApplication::exec () at kernel/qapplication.cpp:3553
#30 0x0804bfef in main (argc=1, argv=0xbf88f484) at /build/buildd/kdepim-4.2.96/kontact/src/main.cpp:218

Reported using DrKonqi