Application that crashed: kontact
Version of the application: 4.3.3
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-15-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was downloading two .pdf files and it shut down without other action. I was also using firefox 3.5 and OOo writer.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f101a2f8c12 in KMLoadPartsCommand::slotPartRetrieved(KMMessage*, QString const&) () from /usr/lib/libkmailprivate.so.4
#6  0x00007f101a2fa8a6 in KMLoadPartsCommand::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkmailprivate.so.4
#7  0x00007f102ff8addc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#8  0x00007f101a347f77 in ?? () from /usr/lib/libkmailprivate.so.4
#9  0x00007f101a353ece in ?? () from /usr/lib/libkmailprivate.so.4
#10 0x00007f101a35825b in ?? () from /usr/lib/libkmailprivate.so.4
#11 0x00007f102ff8addc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x00007f1030360b22 in KJob::result(KJob*) () from /usr/lib/libkdecore.so.5
#13 0x00007f1030360e9f in KJob::emitResult() () from /usr/lib/libkdecore.so.5
#14 0x00007f102e3eae33 in KIO::SimpleJob::slotFinished() () from /usr/lib/libkio.so.5
#15 0x00007f102e3eb2f3 in KIO::TransferJob::slotFinished() () from /usr/lib/libkio.so.5
#16 0x00007f102e3e9c01 in KIO::TransferJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#17 0x00007f102ff8addc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#18 0x00007f102e4abb31 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () from /usr/lib/libkio.so.5
#19 0x00007f102e4a83e3 in KIO::SlaveInterface::dispatch() () from /usr/lib/libkio.so.5
#20 0x00007f102e49b1fd in KIO::Slave::gotInput() () from /usr/lib/libkio.so.5
#21 0x00007f102e49d31c in KIO::Slave::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#22 0x00007f102ff8addc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#23 0x00007f102e3b7f77 in ?? () from /usr/lib/libkio.so.5
#24 0x00007f102e3b809d in KIO::Connection::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#25 0x00007f102ff850f9 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#26 0x00007f1030895efc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x00007f103089d1ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#28 0x00007f10314cce56 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#29 0x00007f102ff75c2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#30 0x00007f102ff7680a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#31 0x00007f102ff9e533 in ?? () from /usr/lib/libQtCore.so.4
#32 0x00007f10297f0bbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#33 0x00007f10297f4588 in ?? () from /lib/libglib-2.0.so.0
#34 0x00007f10297f46b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#35 0x00007f102ff9e1a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x00007f103092a4be in ?? () from /usr/lib/libQtGui.so.4
#37 0x00007f102ff74532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0x00007f102ff74904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#39 0x00007f102ff76ab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#40 0x0000000000403f47 in _start ()

Reported using DrKonqi