Version:           2.1 (using KDE KDE 3.5.6)
Installed from:    Ubuntu Packages

I am not able to find out what exactly causes the crash, but it happens fairly regular... The backlog doesn't seem to contain much (though what would I know)..:

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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 -1235412336 (LWP 7499)]
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[KCrash handler]
#6  0x080785c5 in ?? ()
#7  0x0807b5a2 in ?? ()
#8  0xb6e6688b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#9  0xb6e67330 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#10 0xb71f4ba6 in QTimer::timeout () from /usr/lib/libqt-mt.so.3
#11 0xb6e8e596 in QTimer::event () from /usr/lib/libqt-mt.so.3
#12 0xb6dfda60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#13 0xb6dff88f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#14 0xb75c1ce2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#15 0xb6d901e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#16 0xb6df04ab in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#17 0xb6da4d25 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#18 0xb6e18136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#19 0xb6e17f46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#20 0xb6dff609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#21 0x080653d6 in ?? ()
#22 0xb6617ebc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#23 0x08064ec1 in ?? ()