Version:            (using KDE KDE 3.3.1)
Installed from:    Gentoo Packages
OS:                Linux

Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 16384 (LWP 18739)]
[KCrash handler]
#5  0x40f80279 in QString::QString(QString const&) ()
   from /usr/qt/3/lib/libqt-mt.so.3
#6  0x4080276d in KIconEffect::fingerprint(int, int) const (this=0x85c760c, 
    group=2, state=0) at kiconeffect.cpp:139
#7  0x4080ee37 in KIconFactory::createPixmap(QIconSet const&, QIconSet::Size, QIconSet::Mode, QIconSet::State) (this=0x85943a0, mode_P=1715947877)
    at kiconloader.cpp:1177
#8  0x40c5d7da in QIconSetPrivate::icon(QIconSet const*, QIconSet::Size, QIconSet::Mode, QIconSet::State) () from /usr/qt/3/lib/libqt-mt.so.3
#9  0x40c5ee49 in QIconSet::pixmap(QIconSet::Size, QIconSet::Mode, QIconSet::State) const () from /usr/qt/3/lib/libqt-mt.so.3
#10 0x405c0830 in KToolBarButton::drawButton(QPainter*) (this=0x86043f8, 
    _painter=0x836fcc8) at ktoolbarbutton.cpp:474
#11 0x40d2cbf5 in QButton::paintEvent(QPaintEvent*) ()
   from /usr/qt/3/lib/libqt-mt.so.3
#12 0x0836fcc8 in ?? ()


To reproduce, open konqueror (e.g. welcome screen), click on the home icon and then click around on the toolbar immediately. A higher system load doesn't harm, otherwise your box may win the race.