Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-14-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
KMail consistently crashes when deleting an e-mail that is unread and trying to load a preview from imap (due to it being currently selected).

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007fde9fe11db0 in ?? () from /usr/lib/libkmailprivate.so.4
#6  0x00007fde9fcbac23 in ?? () from /usr/lib/libkmailprivate.so.4
#7  0x00007fde9fdd4727 in KMMoveCommand::execute() () from /usr/lib/libkmailprivate.so.4
#8  0x00007fde9fdba2ca in KMCommand::slotPostTransfer(KMCommand::Result) () from /usr/lib/libkmailprivate.so.4
#9  0x00007fde9fdc44d3 in KMCommand::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkmailprivate.so.4
#10 0x00007fde9fdd5810 in KMMoveCommand::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkmailprivate.so.4
#11 0x00007fdeb5803ddc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x00007fde9fdb744e in KMCommand::messagesTransfered(KMCommand::Result) () from /usr/lib/libkmailprivate.so.4
#13 0x00007fde9fdd2648 in KMCommand::transferSelectedMsgs() () from /usr/lib/libkmailprivate.so.4
#14 0x00007fde9fdd286f in KMCommand::slotStart() () from /usr/lib/libkmailprivate.so.4
#15 0x00007fde9fdc44b6 in KMCommand::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkmailprivate.so.4
#16 0x00007fde9fdd5810 in KMMoveCommand::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkmailprivate.so.4
#17 0x00007fdeb5803ddc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#18 0x00007fdeb5808e1f in ?? () from /usr/lib/libQtCore.so.4
#19 0x00007fdeb57fdd83 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#20 0x00007fdeb610eefc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x00007fdeb61161ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007fdeb6d45ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#23 0x00007fdeb57eec2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#24 0x00007fdeb5819862 in ?? () from /usr/lib/libQtCore.so.4
#25 0x00007fdeb581725d in ?? () from /usr/lib/libQtCore.so.4
#26 0x00007fdeaf068bbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#27 0x00007fdeaf06c588 in ?? () from /lib/libglib-2.0.so.0
#28 0x00007fdeaf06c6b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#29 0x00007fdeb58171a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#30 0x00007fdeb61a34be in ?? () from /usr/lib/libQtGui.so.4
#31 0x00007fdeb57ed532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#32 0x00007fdeb57ed904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#33 0x00007fdeb57efab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#34 0x0000000000403f47 in _start ()

Reported using DrKonqi