Bug 150140

Version:           1.9.6 (using KDE 3.5.6, Kubuntu (feisty) 4:3.5.6-0ubuntu14.1)
Compiler:          Target: i486-linux-gnu
OS:                Linux (i686) release 2.6.20-16-generic

Kontac is crashing when I'm trying to move several dozen of messages (ca. 300) between folders in IMAP account. Both folders are on the same account.
Backtrace included:
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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1242585392 (LWP 21402)]
[New Thread -1286161520 (LWP 21406)]
[New Thread -1277768816 (LWP 21405)]
[New Thread -1269376112 (LWP 21404)]
[New Thread -1260983408 (LWP 21403)]
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[KCrash handler]
#6  0xb513255b in KMHeaders::msgRemoved () from /usr/lib/libkmailprivate.so
#7  0xb52395e9 in KMHeaders::qt_invoke () from /usr/lib/libkmailprivate.so
#8  0xb6ff588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#9  0xb502ffe0 in KMFolder::msgRemoved () from /usr/lib/libkmailprivate.so
#10 0xb5127a4d in KMFolder::qt_emit () from /usr/lib/libkmailprivate.so
#11 0xb6ff585f in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#12 0xb502f120 in FolderStorage::msgRemoved ()
   from /usr/lib/libkmailprivate.so
#13 0xb51a3cac in FolderStorage::take () from /usr/lib/libkmailprivate.so
#14 0xb5289ef0 in KMFolderImap::take () from /usr/lib/libkmailprivate.so
#15 0xb501e83e in FolderStorage::take () from /usr/lib/libkmailprivate.so
#16 0xb5289783 in KMFolderImap::take () from /usr/lib/libkmailprivate.so
#17 0xb5045dd9 in KMFolder::take () from /usr/lib/libkmailprivate.so
#18 0xb528fc1d in KMFolderImap::addMsgQuiet ()
   from /usr/lib/libkmailprivate.so
#19 0xb52b2bb3 in KMFolderImap::qt_invoke () from /usr/lib/libkmailprivate.so
#20 0xb6ff588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#21 0xb5032701 in KMail::FolderJob::messageCopied ()
   from /usr/lib/libkmailprivate.so
#22 0xb51b3f4f in KMail::ImapJob::slotCopyMessageResult ()
   from /usr/lib/libkmailprivate.so
#23 0xb52b9337 in KMail::ImapJob::qt_invoke ()
   from /usr/lib/libkmailprivate.so
#24 0xb6ff588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#25 0xb6aa458e in KIO::Job::result () from /usr/lib/libkio.so.4
#26 0xb6ae6f6d in KIO::Job::emitResult () from /usr/lib/libkio.so.4
#27 0xb6ae73ce in KIO::SimpleJob::slotFinished () from /usr/lib/libkio.so.4
#28 0xb6ae6b01 in KIO::SimpleJob::qt_invoke () from /usr/lib/libkio.so.4
#29 0xb6ff588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#30 0xb6ff6330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#31 0xb6a9fb1c in KIO::SlaveInterface::finished () from /usr/lib/libkio.so.4
#32 0xb6b04970 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.4
#33 0xb6b0cf0a in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.4
#34 0xb6ab3e8c in KIO::Slave::gotInput () from /usr/lib/libkio.so.4
#35 0xb6afd410 in KIO::Slave::qt_invoke () from /usr/lib/libkio.so.4
#36 0xb6ff588b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#37 0xb6ff61a2 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#38 0xb7382547 in QSocketNotifier::activated () from /usr/lib/libqt-mt.so.3
#39 0xb701844a in QSocketNotifier::event () from /usr/lib/libqt-mt.so.3
#40 0xb6f8ca60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#41 0xb6f8e88f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#42 0xb76c8cc2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#43 0xb6f1f1e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#44 0xb6f7ee59 in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/libqt-mt.so.3
#45 0xb6f33d07 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#46 0xb6fa7136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#47 0xb6fa6f46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#48 0xb6f8e609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#49 0x08061e25 in ?? ()
#50 0xbf89fa5c in ?? ()
#51 0x00000001 in ?? ()
#52 0x00000001 in ?? ()
#53 0x00000000 in ?? ()