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 i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
The bug is really repeatable. Evry time there is a time out during downoading emails from gmail or when the connection is down and kmail cannot connect to the gmail server, after the display of the error message, kontact crashes.

Using Kde 4.3.1 from kubuntu jaunty repos.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  KIO::Slave::deref (this=0x9f9eb00) at /build/buildd/kde4libs-4.3.1/kio/kio/slave.cpp:242
#7  0xb6fe0b3c in KIO::Slave::gotInput (this=0x9f9eb00) at /build/buildd/kde4libs-4.3.1/kio/kio/slave.cpp:335
#8  0xb6fe2fc3 in KIO::Slave::qt_metacall (this=0x9f9eb00, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfa8c218) at /build/buildd/kde4libs-4.3.1/obj-i486-linux-gnu/kio/slave.moc:76
#9  0xb5c031b8 in QMetaObject::activate (sender=0x9017038, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#10 0xb5c03e42 in QMetaObject::activate (sender=0x9017038, m=0xb70ce880, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#11 0xb6eec697 in KIO::Connection::readyRead (this=0x9017038) at /build/buildd/kde4libs-4.3.1/obj-i486-linux-gnu/kio/connection.moc:86
#12 0xb6eee003 in KIO::ConnectionPrivate::dequeue (this=0x9fb0768) at /build/buildd/kde4libs-4.3.1/kio/kio/connection.cpp:82
#13 0xb6eee3e6 in KIO::Connection::qt_metacall (this=0x9017038, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x997e830) at /build/buildd/kde4libs-4.3.1/obj-i486-linux-gnu/kio/connection.moc:73
#14 0xb5bfc8cb in QMetaCallEvent::placeMetaCall (this=0xac13da8, object=0x9017038) at kernel/qobject.cpp:477
#15 0xb5bfe3b0 in QObject::event (this=0x9017038, e=0xac13da8) at kernel/qobject.cpp:1111
#16 0xb60b0d3c in QApplicationPrivate::notify_helper (this=0x86b3c60, receiver=0x9017038, e=0xac13da8) at kernel/qapplication.cpp:4056
#17 0xb60b903e in QApplication::notify (this=0xbfa8c9d8, receiver=0x9017038, e=0xac13da8) at kernel/qapplication.cpp:3603
#18 0xb6caa85d in KApplication::notify (this=0xbfa8c9d8, receiver=0x9017038, event=0xac13da8) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#19 0xb5bedbcb in QCoreApplication::notifyInternal (this=0xbfa8c9d8, receiver=0x9017038, event=0xac13da8) at kernel/qcoreapplication.cpp:610
#20 0xb5bee825 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x868a440) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#21 0xb5beea1d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#22 0xb5c196af in postEventSourceDispatch (s=0x86b6390) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#23 0xb4cbeb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0xb4cc20eb in ?? () from /usr/lib/libglib-2.0.so.0
#25 0xb4cc2268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0xb5c192f8 in QEventDispatcherGlib::processEvents (this=0x868a028, flags={i = -1079457624}) at kernel/qeventdispatcher_glib.cpp:327
#27 0xb6152a75 in QGuiEventDispatcherGlib::processEvents (this=0x868a028, flags={i = -1079457576}) at kernel/qguieventdispatcher_glib.cpp:202
#28 0xb5bec1fa in QEventLoop::processEvents (this=0xbfa8c950, flags={i = -1079457512}) at kernel/qeventloop.cpp:149
#29 0xb5bec642 in QEventLoop::exec (this=0xbfa8c950, flags={i = -1079457448}) at kernel/qeventloop.cpp:201
#30 0xb5beeae9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#31 0xb60b0bb7 in QApplication::exec () at kernel/qapplication.cpp:3525
#32 0x0804bfef in _start ()

Reported using DrKonqi