Application that crashed: kontact
Version of the application: 4.3.0 pre
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2)) "release 138"
Qt Version: 4.5.1
Operating System: Linux 2.6.27.23-0.1-pae i686

What I was doing when the application crashed:
. dialog is indicating loss of login to IMAP

kontact had been running and downloading mails for about 24 hours while idling

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb6eb53cd in KIO::Slave::deref() () from /usr/lib/libkio.so.5
#7  0xb6eb5bbc in KIO::Slave::gotInput() () from /usr/lib/libkio.so.5
#8  0xb6eb8043 in KIO::Slave::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#9  0xb6564dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#10 0xb6566552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#11 0xb6dc1087 in KIO::Connection::readyRead() () from /usr/lib/libkio.so.5
#12 0xb6dc29f3 in ?? () from /usr/lib/libkio.so.5
#13 0xb6dc2dd6 in KIO::Connection::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#14 0xb655da1b in QMetaCallEvent::placeMetaCall(QObject*) () from /usr/lib/libQtCore.so.4
#15 0xb655f4b0 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#16 0xb59f969c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0xb5a0199e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#18 0xb6b34b9d in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#19 0xb654eadb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#20 0xb654f725 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#21 0xb654f91d in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#22 0xb657a90f in ?? () from /usr/lib/libQtCore.so.4
#23 0xb4cb5d88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0xb4cb92fb in ?? () from /usr/lib/libglib-2.0.so.0
#25 0xb4cb9478 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0xb657a558 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#27 0xb5a99975 in ?? () from /usr/lib/libQtGui.so.4
#28 0xb654d0fa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#29 0xb654d53a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#30 0xb5ef8863 in QDialog::exec() () from /usr/lib/libQtGui.so.4
#31 0xb6ab07ec in KMessageBox::createKMessageBox(KDialog*, QIcon const&, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon) ()
   from /usr/lib/libkdeui.so.5
#32 0xb6ab1b01 in KMessageBox::createKMessageBox(KDialog*, QMessageBox::Icon, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) ()
   from /usr/lib/libkdeui.so.5
#33 0xb6ab401a in KMessageBox::informationListWId(unsigned long, QString const&, QStringList const&, QString const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib/libkdeui.so.5
#34 0xb6ab4188 in KMessageBox::informationList(QWidget*, QString const&, QStringList const&, QString const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib/libkdeui.so.5
#35 0xb6ab41e8 in KMessageBox::information(QWidget*, QString const&, QString const&, QString const&, QFlags<KMessageBox::Option>) () from /usr/lib/libkdeui.so.5
#36 0xb0d73850 in ?? () from /usr/lib/libkmailprivate.so.4
#37 0xb0d763f0 in ?? () from /usr/lib/libkmailprivate.so.4
#38 0xb0d6b6fb in ?? () from /usr/lib/libkmailprivate.so.4
#39 0xb0da3302 in ?? () from /usr/lib/libkmailprivate.so.4
#40 0xb0da3e8a in ?? () from /usr/lib/libkmailprivate.so.4
#41 0xb6564dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#42 0xb6566552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#43 0xb6788e23 in KJob::result(KJob*) () from /usr/lib/libkdecore.so.5
#44 0xb67892c9 in KJob::emitResult() () from /usr/lib/libkdecore.so.5
#45 0xb6dfc4a5 in KIO::SimpleJob::slotFinished() () from /usr/lib/libkio.so.5
#46 0xb6dfcde3 in KIO::TransferJob::slotFinished() () from /usr/lib/libkio.so.5
#47 0xb6df8f53 in KIO::SimpleJob::slotError(int, QString const&) () from /usr/lib/libkio.so.5
#48 0xb6df914b in KIO::SimpleJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#49 0xb6df924a in KIO::TransferJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#50 0xb6564dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#51 0xb6566552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#52 0xb6ec39e9 in KIO::SlaveInterface::error(int, QString const&) () from /usr/lib/libkio.so.5
#53 0xb6ec7787 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () from /usr/lib/libkio.so.5
#54 0xb6ec3e37 in KIO::SlaveInterface::dispatch() () from /usr/lib/libkio.so.5
#55 0xb6eb5bad in KIO::Slave::gotInput() () from /usr/lib/libkio.so.5
#56 0xb6eb8043 in KIO::Slave::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#57 0xb6564dc8 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#58 0xb6566552 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#59 0xb6dc1087 in KIO::Connection::readyRead() () from /usr/lib/libkio.so.5
#60 0xb6dc29f3 in ?? () from /usr/lib/libkio.so.5
#61 0xb6dc2dd6 in KIO::Connection::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#62 0xb655da1b in QMetaCallEvent::placeMetaCall(QObject*) () from /usr/lib/libQtCore.so.4
#63 0xb655f4b0 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#64 0xb59f969c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#65 0xb5a0199e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#66 0xb6b34b9d in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#67 0xb654eadb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#68 0xb654f725 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#69 0xb654f91d in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#70 0xb657a90f in ?? () from /usr/lib/libQtCore.so.4
#71 0xb4cb5d88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#72 0xb4cb92fb in ?? () from /usr/lib/libglib-2.0.so.0
#73 0xb4cb9478 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#74 0xb657a558 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#75 0xb5a99975 in ?? () from /usr/lib/libQtGui.so.4
#76 0xb654d0fa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#77 0xb654d53a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#78 0xb654f9e9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#79 0xb59f9517 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#80 0x0804c04f in _start ()

Reported using DrKonqi