Version:           1.7.1 (using KDE KDE 3.3.1)
Installed from:    Slackware Packages
Compiler:          gcc 3.3.4 
OS:                Linux

KMail crashed as I was deleting a lot (12) of messages quickly with the "Canc" button.

This is the Backtrace:

Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 9753)]
[KCrash handler]
#5  0x40339c75 in KMMoveCommand::execute ()
   from /opt/kde/lib/libkmailprivate.so.0
#6  0x4033124a in KMCommand::slotPostTransfer ()
   from /opt/kde/lib/libkmailprivate.so.0
#7  0x4032ac02 in KMCommand::qt_invoke ()
   from /opt/kde/lib/libkmailprivate.so.0
#8  0x4032e83d in KMMenuCommand::qt_invoke ()
   from /opt/kde/lib/libkmailprivate.so.0
#9  0x4032ec71 in KMMoveCommand::qt_invoke ()
   from /opt/kde/lib/libkmailprivate.so.0
#10 0x4032eecd in KMDeleteMsgCommand::qt_invoke ()
   from /opt/kde/lib/libkmailprivate.so.0
#11 0x419b818c in QObject::activate_signal ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#12 0x4032aa6a in KMCommand::messagesTransfered ()
   from /opt/kde/lib/libkmailprivate.so.0
#13 0x4033129a in KMCommand::transferSelectedMsgs ()
   from /opt/kde/lib/libkmailprivate.so.0
#14 0x4033106b in KMCommand::slotStart ()
   from /opt/kde/lib/libkmailprivate.so.0
#15 0x4032abec in KMCommand::qt_invoke ()
   from /opt/kde/lib/libkmailprivate.so.0
#16 0x4032e83d in KMMenuCommand::qt_invoke ()
   from /opt/kde/lib/libkmailprivate.so.0
#17 0x4032ec71 in KMMoveCommand::qt_invoke ()
   from /opt/kde/lib/libkmailprivate.so.0
#18 0x4032eecd in KMDeleteMsgCommand::qt_invoke ()
   from /opt/kde/lib/libkmailprivate.so.0
#19 0x419b818c in QObject::activate_signal ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#20 0x41cd9bca in QSignal::signal () from /usr/lib/qt/lib/libqt-mt.so.3
#21 0x419d236d in QSignal::activate () from /usr/lib/qt/lib/libqt-mt.so.3
#22 0x419d9b53 in QSingleShotTimer::event ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#23 0x4195b84f in QApplication::internalNotify ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#24 0x4195ae4e in QApplication::notify () from /usr/lib/qt/lib/libqt-mt.so.3
#25 0x414ed873 in KApplication::notify () from /opt/kde/lib/libkdecore.so.4
#26 0x4194b085 in QEventLoop::activateTimers ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#27 0x4190597b in QEventLoop::processEvents ()
   from /usr/lib/qt/lib/libqt-mt.so.3
#28 0x4196dba8 in QEventLoop::enterLoop () from /usr/lib/qt/lib/libqt-mt.so.3
#29 0x4196da58 in QEventLoop::exec () from /usr/lib/qt/lib/libqt-mt.so.3
#30 0x4195baa1 in QApplication::exec () from /usr/lib/qt/lib/libqt-mt.so.3
#31 0x0804a3c4 in ?? ()
#32 0xbffff7d0 in ?? ()
#33 0xbffff6e0 in ?? ()
#34 0x00000000 in ?? ()
#35 0x00000000 in ?? ()
#36 0x41ddf2c0 in vtable for QGArray () from /usr/lib/qt/lib/libqt-mt.so.3
#37 0x0811d338 in ?? ()
#38 0x422c6e32 in malloc () from /lib/libc.so.6
#39 0x4227b549 in __libc_start_main () from /lib/libc.so.6
#40 0x0804a121 in ?? ()