Application that crashed: kmail
Version of the application: 1.12.0
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.1
Operating System: Linux 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
When I click on a message which has a vcalendar attachment refusing a meeting I had scheduled, kmail crashes instantly.
I receive messages with vcalendar appointments all the time and have never had any problems. Maybe the culprit is the refusal or the fact that I'm the one who scheduled the meeting.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  QString::operator= (this=0x93af754, other=@0xbf9db620) at ../../include/QtCore/../../src/corelib/arch/qatomic_i386.h:132
#7  0xb704b19a in invitationsDetailsIncidence (incidence=0x95f7db0, noHtmlMode=true) at /build/buildd/kdepimlibs-4.2.96/kcal/incidenceformatter.cpp:715
#8  0xb706078e in KCal::IncidenceFormatter::InvitationBodyVisitor::visit (this=0xbf9db8d8, event=0x95f7db0) at /build/buildd/kdepimlibs-4.2.96/kcal/incidenceformatter.cpp:827
#9  0xb6ffdf28 in KCal::Event::accept (this=0x95f7db0, v=@0xbf9db8d8) at /build/buildd/kdepimlibs-4.2.96/kcal/event.h:213
#10 0xb704c65d in formatICalInvitationHelper (invitation=
      {static null = {<No data fields>}, static shared_null = {ref = {_q_value = 30976}, alloc = 0, size = 0, data = 0xb601745a, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, static shared_empty = {ref = {_q_value = 694}, alloc = 0, size = 0, data = 0xb601746e, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, d = 0xbf9dba9c, static codecForCStrings = 0x0}, mCalendar=0xbf9dbad4, helper=0xbf9dbaf0, noHtmlMode=true) at /build/buildd/kdepimlibs-4.2.96/kcal/incidenceformatter.cpp:1227
#11 0xb704d939 in KCal::IncidenceFormatter::formatICalInvitationNoHtml (invitation=
      {static null = {<No data fields>}, static shared_null = {ref = {_q_value = 30976}, alloc = 0, size = 0, data = 0xb601745a, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, static shared_empty = {ref = {_q_value = 694}, alloc = 0, size = 0, data = 0xb601746e, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, d = 0xbf9dbafc, static codecForCStrings = 0x0}, mCalendar=0xbf9dbad4, helper=0xbf9dbaf0) at /build/buildd/kdepimlibs-4.2.96/kcal/incidenceformatter.cpp:1664
#12 0xac93578c in ?? () from /usr/lib/kde4/kmail_bodypartformatter_text_calendar.so
#13 0xb7698907 in ?? () from /usr/lib/libkmailprivate.so.4
#14 0xb7699737 in ?? () from /usr/lib/libkmailprivate.so.4
#15 0xb7699958 in ?? () from /usr/lib/libkmailprivate.so.4
#16 0xb76a7b2b in ?? () from /usr/lib/libkmailprivate.so.4
#17 0xb7698d86 in ?? () from /usr/lib/libkmailprivate.so.4
#18 0xb74fd1a7 in ?? () from /usr/lib/libkmailprivate.so.4
#19 0xb74e864b in ?? () from /usr/lib/libkmailprivate.so.4
#20 0xb74e8860 in ?? () from /usr/lib/libkmailprivate.so.4
#21 0xb74f6eb1 in ?? () from /usr/lib/libkmailprivate.so.4
#22 0xb74f7e07 in ?? () from /usr/lib/libkmailprivate.so.4
#23 0xb74f810a in ?? () from /usr/lib/libkmailprivate.so.4
#24 0xb5f39a58 in QMetaObject::activate (sender=0x95ab298, from_signal_index=4, to_signal_index=4, argv=0xbf9dc2dc) at kernel/qobject.cpp:3120
#25 0xb5f3a6e2 in QMetaObject::activate (sender=0x95ab298, m=0xb7ae94b0, local_signal_index=0, argv=0xbf9dc2dc) at kernel/qobject.cpp:3194
#26 0xb7713af3 in ?? () from /usr/lib/libkmailprivate.so.4
#27 0xb772060f in ?? () from /usr/lib/libkmailprivate.so.4
#28 0xb7724df4 in ?? () from /usr/lib/libkmailprivate.so.4
#29 0xb5f39a58 in QMetaObject::activate (sender=0x95ab6d8, from_signal_index=7, to_signal_index=7, argv=0xbf9dc44c) at kernel/qobject.cpp:3120
#30 0xb5f3a6e2 in QMetaObject::activate (sender=0x95ab6d8, m=0xb7d21da8, local_signal_index=3, argv=0xbf9dc44c) at kernel/qobject.cpp:3194
#31 0xb7bc6cb3 in KJob::result (this=0x95ab6d8, _t1=0x95ab6d8) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kdecore/kjob.moc:188
#32 0xb7bc7159 in KJob::emitResult (this=0x95ab6d8) at /build/buildd/kde4libs-4.2.96/kdecore/jobs/kjob.cpp:304
#33 0xb6cd35a5 in KIO::SimpleJob::slotFinished (this=0x95ab6d8) at /build/buildd/kde4libs-4.2.96/kio/kio/job.cpp:477
#34 0xb6cd3ee3 in KIO::TransferJob::slotFinished (this=0x95ab6d8) at /build/buildd/kde4libs-4.2.96/kio/kio/job.cpp:948
#35 0xb6cd048b in KIO::TransferJob::qt_metacall (this=0x95ab6d8, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0xbf9dc688) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kio/jobclasses.moc:343
#36 0xb5f39a58 in QMetaObject::activate (sender=0x911ca90, from_signal_index=8, to_signal_index=8, argv=0x0) at kernel/qobject.cpp:3120
#37 0xb5f3a6e2 in QMetaObject::activate (sender=0x911ca90, m=0xb6e7bf44, local_signal_index=4, argv=0x0) at kernel/qobject.cpp:3194
#38 0xb6d99417 in KIO::SlaveInterface::finished (this=0x911ca90) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kio/slaveinterface.moc:165
#39 0xb6d9d157 in KIO::SlaveInterface::dispatch (this=0x911ca90, _cmd=104, rawdata=@0xbf9dc854) at /build/buildd/kde4libs-4.2.96/kio/kio/slaveinterface.cpp:175
#40 0xb6d998f7 in KIO::SlaveInterface::dispatch (this=0x911ca90) at /build/buildd/kde4libs-4.2.96/kio/kio/slaveinterface.cpp:91
#41 0xb6d8b66d in KIO::Slave::gotInput (this=0x911ca90) at /build/buildd/kde4libs-4.2.96/kio/kio/slave.cpp:322
#42 0xb6d8db03 in KIO::Slave::qt_metacall (this=0x911ca90, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbf9dc968) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kio/slave.moc:76
#43 0xb5f39a58 in QMetaObject::activate (sender=0x9181f88, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3120
#44 0xb5f3a6e2 in QMetaObject::activate (sender=0x9181f88, m=0xb6e78880, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3194
#45 0xb6c98147 in KIO::Connection::readyRead (this=0x9181f88) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kio/connection.moc:86
#46 0xb6c99ab3 in KIO::ConnectionPrivate::dequeue (this=0x9115030) at /build/buildd/kde4libs-4.2.96/kio/kio/connection.cpp:82
#47 0xb6c99e96 in KIO::Connection::qt_metacall (this=0x9181f88, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x9291238) at /build/buildd/kde4libs-4.2.96/obj-i486-linux-gnu/kio/connection.moc:73
#48 0xb5f326ab in QMetaCallEvent::placeMetaCall (this=0x93096f0, object=0x9181f88) at kernel/qobject.cpp:489
#49 0xb5f34150 in QObject::event (this=0x9181f88, e=0x93096f0) at kernel/qobject.cpp:1118
#50 0xb61aebcc in QApplicationPrivate::notify_helper (this=0x86efe80, receiver=0x9181f88, e=0x93096f0) at kernel/qapplication.cpp:4057
#51 0xb61b6ede in QApplication::notify (this=0xbf9dd198, receiver=0x9181f88, e=0x93096f0) at kernel/qapplication.cpp:3604
#52 0xb7eeb4dd in KApplication::notify (this=0xbf9dd198, receiver=0x9181f88, event=0x93096f0) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#53 0xb5f237ab in QCoreApplication::notifyInternal (this=0xbf9dd198, receiver=0x9181f88, event=0x93096f0) at kernel/qcoreapplication.cpp:610
#54 0xb5f24405 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x867d1f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#55 0xb5f245fd in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#56 0xb5f4f58f in postEventSourceDispatch (s=0x86f0eb8) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#57 0xb432fb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#58 0xb43330eb in ?? () from /usr/lib/libglib-2.0.so.0
#59 0xb4333268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#60 0xb5f4f1d8 in QEventDispatcherGlib::processEvents (this=0x867d3c8, flags={i = -1080176648}) at kernel/qeventdispatcher_glib.cpp:324
#61 0xb6250765 in QGuiEventDispatcherGlib::processEvents (this=0x867d3c8, flags={i = -1080176600}) at kernel/qguieventdispatcher_glib.cpp:202
#62 0xb5f21dda in QEventLoop::processEvents (this=0xbf9dd0a0, flags={i = -1080176536}) at kernel/qeventloop.cpp:149
#63 0xb5f2221a in QEventLoop::exec (this=0xbf9dd0a0, flags={i = -1080176472}) at kernel/qeventloop.cpp:200
#64 0xb5f246c9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#65 0xb61aea47 in QApplication::exec () at kernel/qapplication.cpp:3526
#66 0x0804a7d0 in _start ()

Reported using DrKonqi