Version:           KDE: 3.4.91 (beta1, >= 20050910) (using KDE Devel)
Installed from:    Compiled sources
Compiler:          gcc (GCC) 3.3.4 (pre 3.3.5 20040809) 
OS:                Linux

Trying to log into www.mail.com with your email account crashes Konqueror.  There are popups when logging into mail.com which appear to be causing the crash.  If you change the settings in Konqueror to allow new windows, the crash goes away.

workaround:
Settings -> Configure Konqueror -> Java & JavaScript -> JavaScript page.
Change 'Open new windows' to Allow, instead of Smart.

Crash log:
Using host libthread_db library "/lib/tls/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread 1096182272 (LWP 20568)]
[KCrash handler]
#7  0x00000001 in ?? ()
#8  0x40c6e1ab in qt_inheritedBy () from /usr/lib/qt3/lib/libqt-mt.so.3
#9  0x41cf1ef5 in qt_cast<KHTMLPart*> () from /opt/kdesvn/lib/libkhtml.so.4
#10 0x41e5b9d9 in KJS::Window::retrieve () from /opt/kdesvn/lib/libkhtml.so.4
#11 0x41e60408 in KJS::Window::retrieveWindow ()
   from /opt/kdesvn/lib/libkhtml.so.4
#12 0x41cde239 in KHTMLPart::begin () from /opt/kdesvn/lib/libkhtml.so.4
#13 0x41cdba02 in KHTMLPart::slotData () from /opt/kdesvn/lib/libkhtml.so.4
#14 0x41ce5533 in KHTMLPart::qt_invoke () from /opt/kdesvn/lib/libkhtml.so.4
#15 0x40c6f0ee in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#16 0x401963d9 in KIO::TransferJob::data () from /opt/kdesvn/lib/libkio.so.4
#17 0x401980e4 in KIO::TransferJob::slotData ()
   from /opt/kdesvn/lib/libkio.so.4
#18 0x4019d8af in KIO::TransferJob::qt_invoke ()
   from /opt/kdesvn/lib/libkio.so.4
#19 0x40c6f0ee in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#20 0x40183a7c in KIO::SlaveInterface::data ()
   from /opt/kdesvn/lib/libkio.so.4
#21 0x40186aef in KIO::SlaveInterface::dispatch ()
   from /opt/kdesvn/lib/libkio.so.4
#22 0x4018760d in KIO::SlaveInterface::dispatch ()
   from /opt/kdesvn/lib/libkio.so.4
#23 0x4017f39e in KIO::Slave::gotInput () from /opt/kdesvn/lib/libkio.so.4
#24 0x40182b1c in KIO::Slave::qt_invoke () from /opt/kdesvn/lib/libkio.so.4
#25 0x40c6f0ee in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#26 0x40c6f71d in QObject::activate_signal ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#27 0x40fbffe0 in QSocketNotifier::activated ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#28 0x40c8ed40 in QSocketNotifier::event ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#29 0x40c0c85f in QApplication::internalNotify ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#30 0x40c0e423 in QApplication::notify () from /usr/lib/qt3/lib/libqt-mt.so.3
#31 0x40784afa in KApplication::notify () from /opt/kdesvn/lib/libkdecore.so.4
#32 0x40c009d6 in QEventLoop::activateSocketNotifiers ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#33 0x40bb9f12 in QEventLoop::processEvents ()
   from /usr/lib/qt3/lib/libqt-mt.so.3
#34 0x40c247b1 in QEventLoop::enterLoop () from /usr/lib/qt3/lib/libqt-mt.so.3
#35 0x40c245f6 in QEventLoop::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#36 0x40c0e2ef in QApplication::exec () from /usr/lib/qt3/lib/libqt-mt.so.3
#37 0x4177c77e in kdemain () from /opt/kdesvn/lib/libkdeinit_konqueror.so
#38 0x40951780 in kdeinitmain () from /opt/kdesvn/lib/kde3/konqueror.so
#39 0x0804e5ef in launch ()
#40 0x0804ed42 in handle_launcher_request ()
#41 0x0804f340 in handle_requests ()
#42 0x0804fb53 in main ()