Version:            (using KDE 3.5.9)
Installed from:    Debian testing/unstable Packages
OS:                Linux

I dragged 3 or 4 messages from an IMAP folder to a local folder. KMail crashed immediately, before the messages were actually moved.

[Thread debugging using libthread_db enabled]
[New Thread 0xb56a86c0 (LWP 22676)]
[New Thread 0xb3835b90 (LWP 23926)]
[New Thread 0xb4036b90 (LWP 23925)]
[New Thread 0xb4837b90 (LWP 23924)]
[New Thread 0xb5038b90 (LWP 23923)]
[KCrash handler]
#6  0xb7bb6f89 in KMFolder::open () from /usr/lib/libkmailprivate.so
#7  0xb7d4bfe9 in KMMoveCommand::execute () from /usr/lib/libkmailprivate.so
#8  0xb7d3c3d8 in KMCommand::slotPostTransfer ()
   from /usr/lib/libkmailprivate.so
#9  0xb7d51b14 in KMCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#10 0xb7d51f4b in KMMenuCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#11 0xb7d51fab in KMMoveCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#12 0xb6fdbf6d in QObject::activate_signal (this=0x8406340, clist=0x8816bf8, 
    o=0xbfebe084) at kernel/qobject.cpp:2359
#13 0xb7d3a5ce in KMCommand::messagesTransfered ()
   from /usr/lib/libkmailprivate.so
#14 0xb7d530bc in KMCommand::transferSelectedMsgs ()
   from /usr/lib/libkmailprivate.so
#15 0xb7d53208 in KMCommand::slotStart () from /usr/lib/libkmailprivate.so
#16 0xb7d51af0 in KMCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#17 0xb7d51f4b in KMMenuCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#18 0xb7d51fab in KMMoveCommand::qt_invoke () from /usr/lib/libkmailprivate.so
#19 0xb6fdbf6d in QObject::activate_signal (this=0x82e52f0, clist=0x86271d0, 
    o=0xbfebe214) at kernel/qobject.cpp:2359
#20 0xb730605e in QSignal::signal (this=0x82e52f0, t0=@0x82e5318)
    at .moc/release-shared-mt/moc_qsignal.cpp:100
#21 0xb6ff78c7 in QSignal::activate (this=0x82e52f0) at kernel/qsignal.cpp:215
#22 0xb6ffe993 in QSingleShotTimer::event (this=0x82e52c8)
    at kernel/qtimer.cpp:289
#23 0xb6f7e18a in QApplication::internalNotify (this=0xbfebe700, 
    receiver=0x82e52c8, e=0xbfebe514) at kernel/qapplication.cpp:2638
#24 0xb6f7ef76 in QApplication::notify (this=0xbfebe700, receiver=0x82e52c8, 
    e=0xbfebe514) at kernel/qapplication.cpp:2361
#25 0xb762ec22 in KApplication::notify (this=0xbfebe700, receiver=0x82e52c8, 
    event=0xbfebe514)
    at /tmp/buildd/kdelibs-3.5.9.dfsg.1/./kdecore/kapplication.cpp:550
#26 0xb6f7356e in QEventLoop::activateTimers (this=0x808c2f0)
    at kernel/qapplication.h:523
#27 0xb6f2d348 in QEventLoop::processEvents (this=0x808c2f0, flags=4)
    at kernel/qeventloop_x11.cpp:392
#28 0xb6f94b80 in QEventLoop::enterLoop (this=0x808c2f0)
    at kernel/qeventloop.cpp:201
#29 0xb6f94a16 in QEventLoop::exec (this=0x808c2f0)
    at kernel/qeventloop.cpp:148
#30 0xb6f7dcff in QApplication::exec (this=0xbfebe700)
    at kernel/qapplication.cpp:2761
#31 0x0804a29d in ?? ()
#32 0xbfebe700 in ?? ()
#33 0xbfebe8f0 in ?? ()
#34 0x00000000 in ?? ()