Application that crashed: kontact
Version of the application: 4.3.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Kontact crashed when I tried open an .ico-file which is linked in a mail.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  KIO::Slave::deref (this=0xbc28650) at /build/buildd/kde4libs-4.3.1/kio/kio/slave.cpp:242
#6  0x00007f9d2456ef6f in KIO::Slave::gotInput (this=0xbc28650) at /build/buildd/kde4libs-4.3.1/kio/kio/slave.cpp:335
#7  0x00007f9d245711c8 in KIO::Slave::qt_metacall (this=0xbc28650, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fff2fb1d010) at /build/buildd/kde4libs-4.3.1/obj-x86_64-linux-gnu/kio/slave.moc:76
#8  0x00007f9d2206cea2 in QMetaObject::activate (sender=0x47bb040, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#9  0x00007f9d2448bdb1 in KIO::ConnectionPrivate::dequeue (this=0x3fc7d20) at /build/buildd/kde4libs-4.3.1/kio/kio/connection.cpp:82
#10 0x00007f9d2448c20a in KIO::Connection::qt_metacall (this=0x47bb040, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x79cbaf0)
    at /build/buildd/kde4libs-4.3.1/obj-x86_64-linux-gnu/kio/connection.moc:73
#11 0x00007f9d220675d8 in QObject::event (this=0x47bb040, e=0x64917d0) at kernel/qobject.cpp:1111
#12 0x00007f9d22bd7f4d in QApplicationPrivate::notify_helper (this=0x1318370, receiver=0x47bb040, e=0x64917d0) at kernel/qapplication.cpp:4056
#13 0x00007f9d22be018a in QApplication::notify (this=0x7fff2fb1da70, receiver=0x47bb040, e=0x64917d0) at kernel/qapplication.cpp:4021
#14 0x00007f9d23fdcdeb in KApplication::notify (this=0x7fff2fb1da70, receiver=0x47bb040, event=0x64917d0) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#15 0x00007f9d220576ac in QCoreApplication::notifyInternal (this=0x7fff2fb1da70, receiver=0x47bb040, event=0x64917d0) at kernel/qcoreapplication.cpp:610
#16 0x00007f9d2205831a in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x12e9850) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#17 0x00007f9d22080e03 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#18 0x00007f9d1b7a820a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#19 0x00007f9d1b7ab8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#20 0x00007f9d1b7aba7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#21 0x00007f9d22080a8f in QEventDispatcherGlib::processEvents (this=0x12e90a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#22 0x00007f9d22c70bdf in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#23 0x00007f9d22055f42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 800184720}) at kernel/qeventloop.cpp:149
#24 0x00007f9d22056314 in QEventLoop::exec (this=0x7fff2fb1d9d0, flags={i = 800184800}) at kernel/qeventloop.cpp:201
#25 0x00007f9d220585e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#26 0x0000000000404945 in _start ()

Reported using DrKonqi