Version:           1.9.1 (using KDE 3.5.1, compiled sources)
Compiler:          gcc version 3.4.2 [FreeBSD] 20040728
OS:                FreeBSD (i386) release 5.4-STABLE

When I attempted to empty the 'sent-mail' folder, the KMail program crashed. This is the output of the backtrace.

[Switching to LWP 100128]
0x2a7e72fb in pthread_testcancel () from /usr/lib/libpthread.so.1
#0  0x2a7e72fb in pthread_testcancel () from /usr/lib/libpthread.so.1
#1  0x2a7df3ec in pthread_mutexattr_init () from /usr/lib/libpthread.so.1
#2  0x2a7e3864 in pthread_setconcurrency () from /usr/lib/libpthread.so.1
#3  0x2a7d9756 in _nanosleep () from /usr/lib/libpthread.so.1
#4  0x2a83350f in sleep () from /lib/libc.so.5
#5  0x2a7ce75f in sleep () from /usr/lib/libpthread.so.1
#6  0x29bb5573 in KCrash::startDrKonqi () from /usr/local/lib/libkdecore.so.6
#7  0x29bb5302 in KCrash::defaultCrashHandler ()
   from /usr/local/lib/libkdecore.so.6
#8  0x2a7d5bd6 in sigaction () from /usr/lib/libpthread.so.1
#9  0x2a7d5a08 in sigaction () from /usr/lib/libpthread.so.1
#10 0x2a7d674a in sigaction () from /usr/lib/libpthread.so.1
#11 0x2a7df919 in pthread_mutexattr_init () from /usr/lib/libpthread.so.1
#12 0x2a7df7cf in pthread_mutexattr_init () from /usr/lib/libpthread.so.1
#13 0x2a89fef3 in _ctx_start () from /lib/libc.so.5
#14 0x00000000 in ?? ()
#15 0xbfbfd760 in ?? ()
#16 0xbfbfd4a0 in ?? ()
#17 0x00000000 in ?? ()
#18 0x2a7df760 in pthread_mutexattr_init () from /usr/lib/libpthread.so.1
#19 0x282e12c4 in QDict<KMail::SortCacheItem>::operator[] ()
   from /usr/local/lib/libkmailprivate.so
#20 0x282d5a01 in KMHeaders::msgRemoved ()
   from /usr/local/lib/libkmailprivate.so
#21 0x282e03ff in KMHeaders::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#22 0x2a07a59d in QObject::activate_signal ()
   from /usr/X11R6/lib/libqt-mt.so.3
#23 0x2831479e in KMFolder::msgRemoved ()
   from /usr/local/lib/libkmailprivate.so
#24 0x2831508a in KMFolder::qt_emit () from /usr/local/lib/libkmailprivate.so
#25 0x2a07a571 in QObject::activate_signal ()
   from /usr/X11R6/lib/libqt-mt.so.3
#26 0x28331e5e in FolderStorage::msgRemoved ()
   from /usr/local/lib/libkmailprivate.so
#27 0x2832e98f in FolderStorage::take ()
   from /usr/local/lib/libkmailprivate.so
#28 0x283e80f2 in KMFolderMaildir::take ()
   from /usr/local/lib/libkmailprivate.so
#29 0x283128c1 in KMFolder::take () from /usr/local/lib/libkmailprivate.so
#30 0x283e4f1a in KMFolderMaildir::addMsgInternal ()
   from /usr/local/lib/libkmailprivate.so
#31 0x283e46fa in KMFolderMaildir::addMsg ()
   from /usr/local/lib/libkmailprivate.so
#32 0x2832f053 in FolderStorage::moveMsg ()
   from /usr/local/lib/libkmailprivate.so
#33 0x28312aa8 in KMFolder::moveMsg () from /usr/local/lib/libkmailprivate.so
#34 0x28467093 in KMMoveCommand::execute ()
   from /usr/local/lib/libkmailprivate.so
#35 0x2845dca0 in KMCommand::slotPostTransfer ()
   from /usr/local/lib/libkmailprivate.so
#36 0x28470294 in KMCommand::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#37 0x2847486b in KMMenuCommand::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#38 0x28474dc3 in KMMoveCommand::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#39 0x2847500b in KMDeleteMsgCommand::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#40 0x2a07a59d in QObject::activate_signal ()
   from /usr/X11R6/lib/libqt-mt.so.3
#41 0x284700e2 in KMCommand::messagesTransfered ()
   from /usr/local/lib/libkmailprivate.so
#42 0x2845e126 in KMCommand::transferSelectedMsgs ()
   from /usr/local/lib/libkmailprivate.so
#43 0x2845dc39 in KMCommand::slotStart ()
   from /usr/local/lib/libkmailprivate.so
#44 0x2847027e in KMCommand::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#45 0x2847486b in KMMenuCommand::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#46 0x28474dc3 in KMMoveCommand::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#47 0x2847500b in KMDeleteMsgCommand::qt_invoke ()
   from /usr/local/lib/libkmailprivate.so
#48 0x2a07a59d in QObject::activate_signal ()
   from /usr/X11R6/lib/libqt-mt.so.3
#49 0x2a4062a1 in QSignal::signal () from /usr/X11R6/lib/libqt-mt.so.3
#50 0x2a098f2c in QSignal::activate () from /usr/X11R6/lib/libqt-mt.so.3
#51 0x2a0a164e in QSingleShotTimer::event () from /usr/X11R6/lib/libqt-mt.so.3
#52 0x2a01106f in QApplication::internalNotify ()
   from /usr/X11R6/lib/libqt-mt.so.3
#53 0x2a010396 in QApplication::notify () from /usr/X11R6/lib/libqt-mt.so.3
#54 0x29b0e449 in KApplication::notify () from /usr/local/lib/libkdecore.so.6
#55 0x29f9d014 in QApplication::sendEvent () from /usr/X11R6/lib/libqt-mt.so.3
#56 0x29ffe63e in QEventLoop::activateTimers ()
   from /usr/X11R6/lib/libqt-mt.so.3
#57 0x29fb236b in QEventLoop::processEvents ()
   from /usr/X11R6/lib/libqt-mt.so.3
#58 0x2a027239 in QEventLoop::enterLoop () from /usr/X11R6/lib/libqt-mt.so.3
#59 0x2a027142 in QEventLoop::exec () from /usr/X11R6/lib/libqt-mt.so.3
#60 0x2a011213 in QApplication::exec () from /usr/X11R6/lib/libqt-mt.so.3
#61 0x0804a686 in main ()