Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-16-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
KDE Kontact crashed when I was adding addresses from the address book to a message that I was drafting in Kmail.

I was running KDE Kontact on Ubuntu Linux 9.10, 64 bit version. The CPU is an Intel Core 2 Duo unit. The motherboard is made by Asus.

The following applications were running on my computer system:

1. Gnome File Browser.
2. KDE Kontact.
3. Firefox.
4. Thunderbird.
5. Openoffice.org Calc.
6. Gnome Text Editor.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  QBasicAtomicInt::ref (this=0x28ea440, item=0x2a61520) at /usr/include/qt4/QtCore/qatomic_x86_64.h:121
#6  QString (this=0x28ea440, item=0x2a61520) at /usr/include/qt4/QtCore/qstring.h:712
#7  RecipientItem::key (this=0x28ea440, item=0x2a61520) at ../../kmail/recipientspicker.h:68
#8  RecipientsCollection::getEquivalentItem (this=0x28ea440, item=0x2a61520) at ../../kmail/recipientspicker.cpp:226
#9  0x00007f88fea1c88b in RecipientsPicker::updateList (this=0x37c75c0) at ../../kmail/recipientspicker.cpp:606
#10 0x00007f88fea1eeb2 in RecipientsPicker::setRecipients (this=<value optimized out>, recipients=<value optimized out>) at ../../kmail/recipientspicker.cpp:559
#11 0x00007f88fea163a9 in SideWidget::pickRecipient (this=0x381b8b0) at ../../kmail/recipientseditor.cpp:851
#12 0x00007f88fea17f04 in SideWidget::qt_metacall (this=0x381b8b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff5072d4f0) at ./recipientseditor.moc:498
#13 0x00007f891e193ddc in QMetaObject::activate (sender=0x267b140, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0xfffffffffff8b8e4) at kernel/qobject.cpp:3113
#14 0x00007f891f0a08e7 in QAbstractButton::clicked (this=0x28ea440, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#15 0x00007f891ee0241b in QAbstractButtonPrivate::emitClicked (this=0x27532d0) at widgets/qabstractbutton.cpp:543
#16 0x00007f891ee0402b in QAbstractButtonPrivate::click (this=0x27532d0) at widgets/qabstractbutton.cpp:536
#17 0x00007f891ee04275 in QAbstractButton::mouseReleaseEvent (this=0x267b140, e=0x7fff5072dc10) at widgets/qabstractbutton.cpp:1115
#18 0x00007f891eaed9c0 in QWidget::event (this=0x267b140, event=0x7fff5072dc10) at kernel/qwidget.cpp:7549
#19 0x00007f891ea9eefc in QApplicationPrivate::notify_helper (this=0x135b4f0, receiver=0x267b140, e=0x7fff5072dc10) at kernel/qapplication.cpp:4056
#20 0x00007f891eaa6011 in QApplication::notify (this=<value optimized out>, receiver=0x267b140, e=0x7fff5072dc10) at kernel/qapplication.cpp:3758
#21 0x00007f891f6d5ab6 in KApplication::notify (this=0x7fff5072fb30, receiver=0x267b140, event=0x7fff5072dc10) at ../../kdeui/kernel/kapplication.cpp:302
#22 0x00007f891e17ec2c in QCoreApplication::notifyInternal (this=0x7fff5072fb30, receiver=0x267b140, event=0x7fff5072dc10) at kernel/qcoreapplication.cpp:610
#23 0x00007f891eaa58e0 in QCoreApplication::sendSpontaneousEvent (receiver=0x267b140, event=0x7fff5072dc10, alienWidget=0x267b140, nativeWidget=0x25c58c0, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#24 QApplicationPrivate::sendMouseEvent (receiver=0x267b140, event=0x7fff5072dc10, alienWidget=0x267b140, nativeWidget=0x25c58c0, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at kernel/qapplication.cpp:2924
#25 0x00007f891eb0ba0e in QETWidget::translateMouseEvent (this=0x25c58c0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4409
#26 0x00007f891eb0aaa9 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff5072f740) at kernel/qapplication_x11.cpp:3550
#27 0x00007f891eb33d0c in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#28 0x00007f89179f8bbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#29 0x00007f89179fc588 in ?? () from /lib/libglib-2.0.so.0
#30 0x00007f89179fc6b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#31 0x00007f891e1a71a6 in QEventDispatcherGlib::processEvents (this=0x1327cb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#32 0x00007f891eb334be in QGuiEventDispatcherGlib::processEvents (this=0x28ea440, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#33 0x00007f891e17d532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#34 0x00007f891e17d904 in QEventLoop::exec (this=0x7fff5072fa70, flags=) at kernel/qeventloop.cpp:201
#35 0x00007f891e17fab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#36 0x0000000000403f47 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi