Application that crashed: kontact
Version of the application: 4.3.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.30-gentoo-r5 x86_64

What I was doing when the application crashed:
I have one specific email causing this crash.  The crash may be caused during an attempt to smartly display images or maybe HTML, not sure.  If the email is required, I can try to forward it on.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  QBuffer::readData (this=0x7fffa7eac7a0, data=0x3855a48 "\034\352", len=16384) at io/qbuffer.cpp:412
#6  0x00007f6b9a744f8c in QIODevice::read (this=0x7fffa7eac7a0, data=0x7fffa7eab430 "\b", maxSize=4) at io/qiodevice.cpp:799
#7  0x00007f6b9a7462b1 in QIODevice::read (this=0x7fffa7eac7a0, maxSize=4) at io/qiodevice.cpp:918
#8  0x00007f6b9a7489b5 in QIODevice::peek (this=0x0, maxSize=16384) at io/qiodevice.cpp:1444
#9  0x00007f6b8eb44703 in QTiffHandler::canRead (device=0x3301680) at qtiffhandler.cpp:124
#10 0x00007f6b8eb44836 in QTiffHandler::canRead (this=0x347d140) at qtiffhandler.cpp:108
#11 0x00007f6b8eb44d9b in QTiffHandler::read (this=0x7fffa7eac7a0, image=0x0) at qtiffhandler.cpp:131
#12 0x00007f6b9b653d6a in QImageReader::read (this=0x7fffa7eac7c0, image=0x3301688) at image/qimagereader.cpp:1077
#13 0x00007f6ba050d0c5 in khtmlImLoad::QImageIOLoader::processEOF (this=0x3301670) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/khtml/imload/decoders/qimageioloader.cpp:76
#14 0x00007f6ba0505bfe in khtmlImLoad::Image::processEOF (this=0x32c3690) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/khtml/imload/image.cpp:212
#15 0x00007f6ba042e7ac in khtml::Loader::slotFinished (this=0x250ea20, job=0x3444610) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/khtml/misc/loader.cpp:1461
#16 0x00007f6ba042e9c7 in khtml::Loader::qt_metacall (this=0x250ea20, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa7eaca50)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/khtml/loader.moc:131
#17 0x00007f6b9a7cf486 in QMetaObject::activate (sender=0x3444610, from_signal_index=<value optimized out>, to_signal_index=7, argv=0x0) at kernel/qobject.cpp:3101
#18 0x00007f6b9ae007d2 in KJob::result (this=0x7fffa7eac7a0, _t1=0x3444610) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/kdecore/kjob.moc:188
#19 0x00007f6b9ae00be3 in KJob::emitResult (this=0x3444610) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kdecore/jobs/kjob.cpp:304
#20 0x00007f6b9ced2302 in KIO::SimpleJob::slotFinished (this=0x3444610) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/job.cpp:477
#21 0x00007f6b9ced26d7 in KIO::TransferJob::slotFinished (this=0x3444610) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/job.cpp:948
#22 0x00007f6b9ced814d in KIO::TransferJob::qt_metacall (this=0x3444610, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa7eace30)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/kio/jobclasses.moc:343
#23 0x00007f6b9a7cf486 in QMetaObject::activate (sender=0x34898c0, from_signal_index=<value optimized out>, to_signal_index=8, argv=0x0) at kernel/qobject.cpp:3101
#24 0x00007f6b9cf70dcb in KIO::SlaveInterface::dispatch (this=0x34898c0, _cmd=104, rawdata=<value optimized out>)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/slaveinterface.cpp:175
#25 0x00007f6b9cf71108 in KIO::SlaveInterface::dispatch (this=0x34898c0) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/slaveinterface.cpp:91
#26 0x00007f6b9cf665a9 in KIO::Slave::gotInput (this=0x34898c0) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/slave.cpp:322
#27 0x00007f6b9cf67580 in KIO::Slave::qt_metacall (this=0x34898c0, _c=QMetaObject::InvokeMetaMethod, _id=53483136, _a=0x7fffa7ead1e0)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/kio/slave.moc:76
#28 0x00007f6b9a7cf486 in QMetaObject::activate (sender=0x341f770, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3101
#29 0x00007f6b9ceaa911 in KIO::ConnectionPrivate::dequeue (this=0x3482950) at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kio/kio/connection.cpp:82
#30 0x00007f6b9ceab612 in KIO::Connection::qt_metacall (this=0x341f770, _c=QMetaObject::InvokeMetaMethod, _id=53483136, _a=0x27ed4a0)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4_build/kio/connection.moc:73
#31 0x00007f6b9a7d21e9 in QObject::event (this=0x341f770, e=0x367a210) at kernel/qobject.cpp:1099
#32 0x00007f6b9b58cbd5 in QApplicationPrivate::notify_helper (this=0x231e3a0, receiver=0x341f770, e=0x367a210) at kernel/qapplication.cpp:4065
#33 0x00007f6b9b58f2a0 in QApplication::notify (this=0x7fffa7eadc40, receiver=0x341f770, e=0x367a210) at kernel/qapplication.cpp:4030
#34 0x00007f6b9c450710 in KApplication::notify (this=0x7fffa7eadc40, receiver=0x341f770, event=0x367a210)
    at /var/tmp/portage/kde-base/kdelibs-4.3.4/work/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:302
#35 0x00007f6b9a7b9d2b in QCoreApplication::notifyInternal (this=0x7fffa7eadc40, receiver=0x341f770, event=0x367a210) at kernel/qcoreapplication.cpp:606
#36 0x00007f6b9a7bd17f in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x22f7180) at kernel/qcoreapplication.h:213
#37 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x22f7180) at kernel/qcoreapplication.cpp:1244
#38 0x00007f6b9a7e8a13 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at kernel/qcoreapplication.h:218
#39 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#40 0x00007f6b95aec27d in g_main_dispatch () from /usr/lib/libglib-2.0.so.0
#41 0x00007f6b95aedf85 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#42 0x00007f6b95aee0be in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#43 0x00007f6b9a7e872f in QEventDispatcherGlib::processEvents (this=0x22f6990, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#44 0x00007f6b9b630e88 in QGuiEventDispatcherGlib::processEvents (this=0x7fffa7eac7a0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#45 0x00007f6b9a7b8a52 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#46 0x00007f6b9a7b8eb6 in QEventLoop::exec (this=0x7fffa7eadbb0, flags=...) at kernel/qeventloop.cpp:197
#47 0x00007f6b9a7bd3fe in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#48 0x00000000004040ba in main (argc=1, argv=0x7fffa7eae158) at /var/tmp/portage/kde-base/kontact-4.3.4/work/kontact-4.3.4/kontact/src/main.cpp:218

Reported using DrKonqi