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 i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Importing the file went fine, but since then Kontact crashes randomly after some time. It doesn't matter wether I edit something in the ics file in Kontakt or in Lightning.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0x09b706f9 in ?? ()
#7  0x034d1faa in KOrg::MonthView::reloadIncidences (this=0x9b6b920) at ../../korganizer/views/monthview/monthview.cpp:327
#8  0x034d323c in KOrg::MonthView::setStartDate (this=0x9b6b920, start=...) at ../../korganizer/views/monthview/monthview.cpp:293
#9  0x034d32ae in KOrg::MonthView::showDates (this=0x9b6b920, start=..., end=...) at ../../korganizer/views/monthview/monthview.cpp:280
#10 0x0351e53a in KOViewManager::updateView (this=0x9adb308, start=..., end=...) at ../../korganizer/koviewmanager.cpp:215
#11 0x0350c327 in CalendarView::updateView (this=0x9aa9f08, start=..., end=..., updateTodos=true) at ../../korganizer/calendarview.cpp:801
#12 0x0350e055 in CalendarView::updateView (this=0x9aa9f08) at ../../korganizer/calendarview.cpp:810
#13 0x0350ba30 in CalendarView::resourcesChanged (this=0x9aa9f08) at ../../korganizer/calendarview.cpp:2528
#14 0x0351cac8 in CalendarView::qt_metacall (this=0x9aa9f08, _c=QMetaObject::InvokeMetaMethod, _id=174, _a=0xbfee5c3c) at ./calendarview.moc:571
#15 0x007b0263 in QMetaObject::activate (sender=0x9b50498, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#16 0x007b0ec2 in QMetaObject::activate (sender=0x9b50498, m=0xdf4e4c, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#17 0x00d587a7 in KCal::Calendar::calendarChanged (this=0x9b50498) at ./calendar.moc:86
#18 0x00d5880d in KCal::Calendar::qt_metacall (this=0x9b50498, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfee5de8) at ./calendar.moc:73
#19 0x00dbfaaa in KCal::CalendarResources::qt_metacall (this=0x9b50498, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfee5de8) at ./calendarresources.moc:76
#20 0x007b0263 in QMetaObject::activate (sender=0x9b6a9b0, from_signal_index=4, to_signal_index=4, argv=0xbfee5de8) at kernel/qobject.cpp:3113
#21 0x007b0ec2 in QMetaObject::activate (sender=0x9b6a9b0, m=0xdf57d4, local_signal_index=0, argv=0xbfee5de8) at kernel/qobject.cpp:3187
#22 0x00dacdc3 in KCal::ResourceCalendar::resourceChanged (this=0x9b6a9b0, _t1=0x9b6a9b0) at ./resourcecalendar.moc:117
#23 0x03299d3e in KCal::ResourceRemote::doLoad (this=0x9b6a9b0, syncCache=true) at ../../../kresources/remote/resourceremote.cpp:193
#24 0x00dba389 in KCal::ResourceCached::load (this=0x9b6a9b0, action=KCal::ResourceCached::SyncCache) at ../../kcal/resourcecached.cpp:409
#25 0x00dba8f4 in KCal::ResourceCached::slotReload (this=0x9b6a9b0) at ../../kcal/resourcecached.cpp:808
#26 0x00dbb3bd in KCal::ResourceCached::qt_metacall (this=0x9b6a9b0, _c=QMetaObject::InvokeMetaMethod, _id=15, _a=0xbfee608c) at ./resourcecached.moc:71
#27 0x0329988a in KCal::ResourceRemote::qt_metacall (this=0x9b6a9b0, _c=QMetaObject::InvokeMetaMethod, _id=15, _a=0xbfee608c) at ./resourceremote.moc:65
#28 0x007b0263 in QMetaObject::activate (sender=0x9b70704, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#29 0x007b0ec2 in QMetaObject::activate (sender=0x9b70704, m=0x88b904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#30 0x007ea667 in QTimer::timeout (this=0x9b70704) at .moc/release-shared/moc_qtimer.cpp:128
#31 0x007b59ae in QTimer::timerEvent (this=0x9b70704, e=0xbfee6520) at kernel/qtimer.cpp:261
#32 0x007aa3bf in QObject::event (this=0x9b70704, e=0xbfee6520) at kernel/qobject.cpp:1075
#33 0x015b8f54 in QApplicationPrivate::notify_helper (this=0x9191208, receiver=0x9b70704, e=0xbfee6520) at kernel/qapplication.cpp:4056
#34 0x015c067c in QApplication::notify (this=0xbfee6884, receiver=0x9b70704, e=0xbfee6520) at kernel/qapplication.cpp:3603
#35 0x0108a25a in KApplication::notify (this=0xbfee6884, receiver=0x9b70704, event=0xbfee6520) at ../../kdeui/kernel/kapplication.cpp:302
#36 0x0079a6cb in QCoreApplication::notifyInternal (this=0xbfee6884, receiver=0x9b70704, event=0xbfee6520) at kernel/qcoreapplication.cpp:610
#37 0x007c77ce in QCoreApplication::sendEvent (this=0x918773c) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#38 QTimerInfoList::activateTimers (this=0x918773c) at kernel/qeventdispatcher_unix.cpp:572
#39 0x007c50e0 in timerSourceDispatch (source=0x9187708) at kernel/qeventdispatcher_glib.cpp:165
#40 0x03aece88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#41 0x03af0730 in ?? () from /lib/libglib-2.0.so.0
#42 0x03af0863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#43 0x007c502c in QEventDispatcherGlib::processEvents (this=0x91669f8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#44 0x01659be5 in QGuiEventDispatcherGlib::processEvents (this=0x91669f8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#45 0x00798c79 in QEventLoop::processEvents (this=0xbfee67e4, flags=) at kernel/qeventloop.cpp:149
#46 0x007990ca in QEventLoop::exec (this=0xbfee67e4, flags=...) at kernel/qeventloop.cpp:201
#47 0x0079b53f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#48 0x015b8dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#49 0x0804b4e6 in main (argc=1, argv=0xbfee6aa4) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi