Version:           3.3.2 (using KDE KDE 3.3.2)
Installed from:    SuSE RPMs
OS:                Linux

Regularly but not reproducible clicking on an URL in kmail opens konqueror but a few seconds later it disappears and the KDE DRKonqi window appears. It shows a signal 11 (SIGSEGV) and the following text in the Backtrace:

[New Thread 16384 (LWP 7271)]
[KCrash handler]
#4  0x4080f2c5 in KIconLoader::loadIcon(QString const&, KIcon::Group, int, int, QString*, bool) const () from /opt/kde3/lib/libkdecore.so.4
#5  0x4081278e in KIconFactory::createPixmap(QIconSet const&, QIconSet::Size, QIconSet::Mode, QIconSet::State) () from /opt/kde3/lib/libkdecore.so.4
#6  0x40c5efe5 in QIconSetPrivate::icon(QIconSet const*, QIconSet::Size, QIconSet::Mode, QIconSet::State) () from /usr/lib/qt3/lib/libqt-mt.so.3
#7  0x40c5f9b7 in QIconSet::pixmap(QIconSet::Size, QIconSet::Mode, QIconSet::State) const () from /usr/lib/qt3/lib/libqt-mt.so.3
#8  0x405a64b0 in KToolBarButton::drawButton(QPainter*) ()
   from /opt/kde3/lib/libkdeui.so.4
#9  0x40d2aaf6 in QButton::paintEvent(QPaintEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#10 0x40ccfe82 in QWidget::event(QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#11 0x40c363b6 in QApplication::internalNotify(QObject*, QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#12 0x40c356de in QApplication::notify(QObject*, QEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#13 0x407aa2ee in KApplication::notify(QObject*, QEvent*) ()
   from /opt/kde3/lib/libkdecore.so.4
#14 0x40bc7303 in QETWidget::translatePaintEvent(_XEvent const*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#15 0x40bc22e2 in QApplication::x11ProcessEvent(_XEvent*) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#16 0x40bda8ed in QEventLoop::processEvents(unsigned) ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#17 0x40c49100 in QEventLoop::enterLoop() ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#18 0x40c48ff6 in QEventLoop::exec() () from /usr/lib/qt3/lib/libqt-mt.so.3
#19 0x40c3664f in QApplication::exec() () from /usr/lib/qt3/lib/libqt-mt.so.3
#20 0x4171a22c in kdemain () from /opt/kde3/lib/libkdeinit_konqueror.so
#21 0x0804dcc9 in launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) ()
#22 0x0804ec41 in handle_launcher_request(int) ()
#23 0x0804f2ba in handle_requests(int) ()
#24 0x08050341 in main ()

Clicking a second time on the link in kmail works OK; brings up Konqueror and the webpage.
The content of the URL does not seem to have any relevance to the problem; I did have this problem with several different links in kmail.