Application: kontact (4.4.3)
KDE Platform Version: 4.4.3 (KDE 4.4.3)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-22-generic i686
Distribution: Ubuntu 10.04 LTS

-- Information about the crash:
KMail crashed while I was writing an email while it was running over an SSH tunnel.

The KDE version on the computer running KMail is 4.4.3 while the version on the computer I was working from is 4.4.1.
The error message on the console was simply: *** KMail got signal 11 (Crashing)

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0x00000000 in ?? ()
#7  0x010f030e in QObject::connect (sender=0xc18a358, signal=0xf30bb4 "2addressBookChanged(AddressBook*)", receiver=0xadd90c0, method=0xf328ee "1loadContacts()", type=Qt::AutoConnection)
    at kernel/qobject.cpp:2550
#8  0x00e9d097 in QObject::connect (this=0xadd90c0) at /usr/include/qt4/QtCore/qobject.h:315
#9  KPIM::AddresseeLineEdit::loadContacts (this=0xadd90c0) at ../../libkdepim/addresseelineedit.cpp:601
#10 0xb3db2af2 in KMLineEdit::loadContacts (this=0xadd90c0) at ../../kmail/kmlineeditspell.cpp:195
#11 0x00e9f44b in KPIM::AddresseeLineEdit::doCompletion (this=0xadd90c0, ctrlT=false) at ../../libkdepim/addresseelineedit.cpp:422
#12 0x00ea2e25 in KPIM::AddresseeLineEdit::slotCompletion (this=0xadd90c0) at ../../libkdepim/addresseelineedit.cpp:995
#13 0x00ea4a6b in KPIM::AddresseeLineEdit::qt_metacall (this=0xadd90c0, _c=QMetaObject::InvokeMetaMethod, _id=81, _a=0xbfa89678) at ./addresseelineedit.moc:97
#14 0xb3db2a6a in KMLineEdit::qt_metacall (this=0xadd90c0, _c=QMetaObject::InvokeMetaMethod, _id=81, _a=0xbfa89678) at ./kmlineeditspell.moc:74
#15 0xb3e2821a in RecipientLineEdit::qt_metacall (this=0xadd90c0, _c=QMetaObject::InvokeMetaMethod, _id=81, _a=0xbfa89678) at ./recipientseditor.moc:135
#16 0x010e2c9a in QMetaObject::metacall (object=0xadd90c0, cl=QMetaObject::ReadProperty, idx=81, argv=0xbfa89678) at kernel/qmetaobject.cpp:237
#17 0x010f13d5 in QMetaObject::activate (sender=0xadd90c0, m=0xca8ba0, local_signal_index=2, argv=0xbfa89678) at kernel/qobject.cpp:3293
#18 0x00bc30e3 in KLineEdit::completion (this=0xadd90c0, _t1=...) at ./klineedit.moc:233
#19 0x00bc3297 in KLineEdit::doCompletion (this=0xadd90c0, txt=...) at ../../kdeui/widgets/klineedit.cpp:1769
#20 0x00bc7a45 in KLineEdit::keyPressEvent (this=0xadd90c0, e=0xbfa89f74) at ../../kdeui/widgets/klineedit.cpp:926
#21 0x00ea3076 in KPIM::AddresseeLineEdit::keyPressEvent (this=0xadd90c0, e=0xbfa89f74) at ../../libkdepim/addresseelineedit.cpp:233
#22 0xb3db253e in KMLineEdit::keyPressEvent (this=0xadd90c0, e=0xbfa89f74) at ../../kmail/kmlineeditspell.cpp:77
#23 0xb3e29e1c in RecipientLineEdit::keyPressEvent (this=0xadd90c0, ev=0xbfa89f74) at ../../kmail/recipientseditor.cpp:144
#24 0x07747503 in QWidget::event (this=0xadd90c0, event=0xbfa89f74) at kernel/qwidget.cpp:8033
#25 0x07b54aeb in QLineEdit::event (this=0xadd90c0, e=0xbfa89f74) at widgets/qlineedit.cpp:1474
#26 0x00bc8eec in KLineEdit::event (this=0xadd90c0, ev=0xbfa89f74) at ../../kdeui/widgets/klineedit.cpp:1329
#27 0x076e94dc in QApplicationPrivate::notify_helper (this=0x9858098, receiver=0xadd90c0, e=0xbfa89f74) at kernel/qapplication.cpp:4300
#28 0x076f1b71 in QApplication::notify (this=0xbfa8a9d4, receiver=0xadd90c0, e=0xbfa89f74) at kernel/qapplication.cpp:3763
#29 0x00adcf5a in KApplication::notify (this=0xbfa8a9d4, receiver=0xadd90c0, event=0xbfa89f74) at ../../kdeui/kernel/kapplication.cpp:302
#30 0x010dda3b in QCoreApplication::notifyInternal (this=0xbfa8a9d4, receiver=0xadd90c0, event=0xbfa89f74) at kernel/qcoreapplication.cpp:704
#31 0x076ea2be in QCoreApplication::sendSpontaneousEvent (receiver=0xadd90c0, event=0xbfa891e0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#32 qt_sendSpontaneousEvent (receiver=0xadd90c0, event=0xbfa891e0) at kernel/qapplication.cpp:5279
#33 0x077a3d90 in QKeyMapper::sendKeyEvent (keyWidget=0xadd90c0, grab=false, type=QEvent::KeyPress, code=73, modifiers=..., text=..., autorepeat=<value optimized out>, count=<value optimized out>, 
    nativeScanCode=31, nativeVirtualKey=105, nativeModifiers=0) at kernel/qkeymapper_x11.cpp:1861
#34 0x077a62f5 in QKeyMapperPrivate::translateKeyEvent (this=0x9882080, keyWidget=0xadd90c0, event=0xbfa8a63c, grab=248) at kernel/qkeymapper_x11.cpp:1831
#35 0x07779757 in QApplication::x11ProcessEvent (this=0xbfa8a9d4, event=0xbfa8a63c) at kernel/qapplication_x11.cpp:3394
#36 0x077a960a in x11EventSourceDispatch (s=0x985a7b0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#37 0x0840e5e5 in g_main_dispatch (context=0x9859ec8) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:1960
#38 IA__g_main_context_dispatch (context=0x9859ec8) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2513
#39 0x084122d8 in g_main_context_iterate (context=0x9859ec8, block=<value optimized out>, dispatch=1, self=0x9855cc8) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2591
#40 0x084124b8 in IA__g_main_context_iteration (context=0x9859ec8, may_block=1) at /build/buildd/glib2.0-2.24.0/glib/gmain.c:2654
#41 0x011095d5 in QEventDispatcherGlib::processEvents (this=0x9824070, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#42 0x077a9135 in QGuiEventDispatcherGlib::processEvents (this=0x9824070, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#43 0x010dc059 in QEventLoop::processEvents (this=0xbfa8a934, flags=) at kernel/qeventloop.cpp:149
#44 0x010dc4aa in QEventLoop::exec (this=0xbfa8a934, flags=...) at kernel/qeventloop.cpp:201
#45 0x010e069f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#46 0x076e9577 in QApplication::exec () at kernel/qapplication.cpp:3579
#47 0x0804b472 in main (argc=1, argv=0xbfa8abf4) at ../../../kontact/src/main.cpp:224

Reported using DrKonqi