Version:           1.8.1 (using KDE KDE 3.4.1)
Installed from:    Unlisted Binary Package
OS:                Linux

When I drag a message from an imap folder into another imap folder, and then hit the delete key immediately afterward (to delete the next message), KMail crashes.  This sounds like the same thing that appears in this (old, resolved) bug:

http://bugs.kde.org/show_bug.cgi?id=58955

Which is that an imap transfer being in progress causes other imap operations to fail.

[KCrash handler]
#4  0x05915352 in KMMsgBase::transferInProgress () from /usr/lib/libkmailprivate.so
#5  0x05925c77 in KMail::ImapJob::slotGetBodyStructureResult () from /usr/lib/libkmailprivate.so
#6  0x059270b8 in KMail::ImapJob::qt_invoke () from /usr/lib/libkmailprivate.so
#7  0x03f5e62e in QObject::activate_signal () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#8  0x049bfad9 in KIO::Job::result () from /usr/lib/libkio.so.4
#9  0x049e9f08 in KIO::Job::emitResult () from /usr/lib/libkio.so.4
#10 0x04a192be in KIO::SimpleJob::slotFinished () from /usr/lib/libkio.so.4
#11 0x04a19a28 in KIO::TransferJob::slotFinished () from /usr/lib/libkio.so.4
#12 0x049e9b32 in KIO::TransferJob::qt_invoke () from /usr/lib/libkio.so.4
#13 0x03f5e62e in QObject::activate_signal () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#14 0x03f5ed04 in QObject::activate_signal () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#15 0x049bdee0 in KIO::SlaveInterface::finished () from /usr/lib/libkio.so.4
#16 0x04a0a2a2 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.4
#17 0x049e7bc3 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.4
#18 0x049debdc in KIO::Slave::gotInput () from /usr/lib/libkio.so.4
#19 0x049e6365 in KIO::Slave::qt_invoke () from /usr/lib/libkio.so.4
#20 0x03f5e62e in QObject::activate_signal () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#21 0x03f5ebc0 in QObject::activate_signal () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#22 0x04292450 in QSocketNotifier::activated () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#23 0x03f79755 in QSocketNotifier::event () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#24 0x03effa19 in QApplication::internalNotify () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#25 0x03effbaa in QApplication::notify () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#26 0x008945d8 in KApplication::notify () from /usr/lib/libkdecore.so.4
#27 0x03ef3ed2 in QEventLoop::activateSocketNotifiers () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#28 0x03eae25e in QEventLoop::processEvents () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#29 0x03f150b5 in QEventLoop::enterLoop () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#30 0x03f1500e in QEventLoop::exec () from /usr/lib/qt-3.3/lib/libqt-mt.so.3
#31 0x03efec1b in QApplication::exec () from /usr/lib/qt-3.3/lib/libqt-mt.so.3