Comment 2 for bug 117363

I'm experiencing this problem on Gutsy. Here's the stack trace:

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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 -1243248960 (LWP 16763)]
[New Thread -1287484528 (LWP 16767)]
[New Thread -1279091824 (LWP 16766)]
[New Thread -1270699120 (LWP 16765)]
[New Thread -1262306416 (LWP 16764)]
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[KCrash handler]
#6 0xb4f19989 in KMFolder::open () from /usr/lib/libkmailprivate.so
#7 0xb507caf9 in KMMoveCommand::execute () from /usr/lib/libkmailprivate.so
#8 0xb506c609 in KMCommand::slotPostTransfer ()
   from /usr/lib/libkmailprivate.so
#9 0xb5074116 in KMCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#10 0xb507443b in KMMenuCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#11 0xb50744c7 in KMMoveCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#12 0xb507453b in KMDeleteMsgCommand::qt_invoke ()
   from /usr/lib/libkmailprivate.so
#13 0xb66f7893 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#14 0xb506b17e in KMCommand::messagesTransfered ()
   from /usr/lib/libkmailprivate.so
#15 0xb5075111 in KMCommand::transferSelectedMsgs ()
   from /usr/lib/libkmailprivate.so
#16 0xb5075277 in KMCommand::slotStart () from /usr/lib/libkmailprivate.so
#17 0xb5074128 in KMCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#18 0xb507443b in KMMenuCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#19 0xb50744c7 in KMMoveCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#20 0xb507453b in KMDeleteMsgCommand::qt_invoke ()
   from /usr/lib/libkmailprivate.so
#21 0xb66f7893 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#22 0xb6a838e8 in QSignal::signal () from /usr/lib/libqt-mt.so.3
#23 0xb6717842 in QSignal::activate () from /usr/lib/libqt-mt.so.3
#24 0xb671f258 in QSingleShotTimer::event () from /usr/lib/libqt-mt.so.3
#25 0xb668eaf0 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#26 0xb669091f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#27 0xb6e55242 in KApplication::notify () from /usr/lib/libkdecore.so.4
#28 0xb6621209 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#29 0xb668153b in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#30 0xb6635d49 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#31 0xb66a91ce in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#32 0xb6690617 in QApplication::enter_loop () from /usr/lib/libqt-mt.so.3
#33 0xb681ee81 in QPopupMenu::exec () from /usr/lib/libqt-mt.so.3
#34 0xb4ec2e77 in KMFolderTree::slotContextMenuRequested ()
   from /usr/lib/libkmailprivate.so
#35 0xb4ec4a8e in KMFolderTree::qt_invoke () from /usr/lib/libkmailprivate.so
#36 0xb66f7893 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#37 0xb6a9aa9c in QListView::contextMenuRequested ()
   from /usr/lib/libqt-mt.so.3
#38 0xb67f5266 in QListView::contentsContextMenuEvent ()
   from /usr/lib/libqt-mt.so.3
#39 0xb682c932 in QScrollView::viewportContextMenuEvent ()
   from /usr/lib/libqt-mt.so.3
#40 0xb682e780 in QScrollView::eventFilter () from /usr/lib/libqt-mt.so.3
#41 0xb67f6806 in QListView::eventFilter () from /usr/lib/libqt-mt.so.3
#42 0xb4ebd219 in KMFolderTree::eventFilter ()
   from /usr/lib/libkmailprivate.so
#43 0xb66f6e40 in QObject::activate_filters () from /usr/lib/libqt-mt.so.3
#44 0xb66f6ebe in QObject::event () from /usr/lib/libqt-mt.so.3
#45 0xb672e5b3 in QWidget::event () from /usr/lib/libqt-mt.so.3
#46 0xb668eaf0 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#47 0xb669112b in QApplication::notify () from /usr/lib/libqt-mt.so.3
#48 0xb6e55242 in KApplication::notify () from /usr/lib/libkdecore.so.4
#49 0xb662127d in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#50 0xb661ff4e in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#51 0xb661dfcc in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#52 0xb66351a4 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#53 0xb66a91ce in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#54 0xb66a8fde in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#55 0xb6690699 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#56 0x0805b7b5 in ?? ()
#57 0xbfdbc73c in ?? ()
#58 0x00000001 in ?? ()
#59 0x00000001 in ?? ()
#60 0x00000000 in ?? ()