Если начать выделять мышкой текст в письме при нажатом Shift, 
то KMail падает. 
 
[KCrash handler]  
#5  0x40420453 in KMHandleAttachmentCommand::slotStart ()  
   from /usr/lib/libkmailprivate.so  
#6  0x403e21ac in KMHandleAttachmentCommand::qt_invoke ()  
   from /usr/lib/libkmailprivate.so  
#7  0x40792ce4 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3  
#8  0x40acb6ad in QSignal::signal () from /usr/lib/libqt-mt.so.3  
#9  0x407ad9b1 in QSignal::activate () from /usr/lib/libqt-mt.so.3  
#10 0x407b5523 in QSingleShotTimer::event () from /usr/lib/libqt-mt.so.3  
#11 0x4072f71f in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3  
#12 0x4072f8cc in QApplication::notify () from /usr/lib/libqt-mt.so.3  
#13 0x40d63b55 in KApplication::notify () from /usr/lib/libkdecore.so.4  
#14 0x4071e27c in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3  
#15 0x406d4667 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3  
#16 0x40745411 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3  
#17 0x40745366 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3  
#18 0x4072e87f in QApplication::exec () from /usr/lib/libqt-mt.so.3  
#19 0x0804a046 in ?? ()  
#20 0xbfb9a830 in ?? ()  
#21 0xbfb9a740 in ?? ()  
#22 0x00000000 in ?? ()  
#23 0x00000000 in ?? ()  
#24 0x40bf7a60 in kde_malloc_is_used () from /usr/lib/libqt-mt.so.3  
#25 0x0805bff0 in ?? ()  
#26 0x40bf7a60 in kde_malloc_is_used () from /usr/lib/libqt-mt.so.3  
#27 0x40bcf454 in ?? () from /usr/lib/libqt-mt.so.3  
#28 0x40be6230 in vtable for QGArray () from /usr/lib/libqt-mt.so.3  
#29 0x08175ad0 in ?? ()  
#30 0x40bf7e60 in kde_malloc_is_used () from /usr/lib/libqt-mt.so.3  
#31 0x0805cc80 in ?? ()  
#32 0x40505a50 in vtable for KMKernel () from /usr/lib/libkmailprivate.so  
#33 0x40ef549e in __libc_start_main () from /lib/libc.so.6  
#34 0x40ef549e in __libc_start_main () from /lib/libc.so.6  
#35 0x08049dc1 in ?? ()