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:
The crash occurred when the address book was being opened while composing an e-mail message in Kmail.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  QBasicAtomicInt::deref (this=0x3fb5b78, other=...) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:133
#6  QString::operator= (this=0x3fb5b78, other=...) at tools/qstring.cpp:1132
#7  0x00007f1e18220a49 in RecipientItem::setRecipientType (this=0x4006830) at ../../kmail/recipientspicker.cpp:153
#8  RecipientsPicker::updateList (this=0x4006830) at ../../kmail/recipientspicker.cpp:610
#9  0x00007f1e18222eb2 in RecipientsPicker::setRecipients (this=<value optimized out>, recipients=<value optimized out>) at ../../kmail/recipientspicker.cpp:559
#10 0x00007f1e1821a3a9 in SideWidget::pickRecipient (this=0x2c72b20) at ../../kmail/recipientseditor.cpp:851
#11 0x00007f1e1821bf04 in SideWidget::qt_metacall (this=0x2c72b20, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff06e153b0) at ./recipientseditor.moc:498
#12 0x00007f1e3308dddc in QMetaObject::activate (sender=0x2c74b50, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x3a3b09a) at kernel/qobject.cpp:3113
#13 0x00007f1e33f9a8e7 in QAbstractButton::clicked (this=0x3fb5b78, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#14 0x00007f1e33cfc41b in QAbstractButtonPrivate::emitClicked (this=0x2c74bc0) at widgets/qabstractbutton.cpp:543
#15 0x00007f1e33cfe02b in QAbstractButtonPrivate::click (this=0x2c74bc0) at widgets/qabstractbutton.cpp:536
#16 0x00007f1e33cfe275 in QAbstractButton::mouseReleaseEvent (this=0x2c74b50, e=0x7fff06e15ad0) at widgets/qabstractbutton.cpp:1115
#17 0x00007f1e339e79c0 in QWidget::event (this=0x2c74b50, event=0x7fff06e15ad0) at kernel/qwidget.cpp:7549
#18 0x00007f1e33998efc in QApplicationPrivate::notify_helper (this=0x25ecc00, receiver=0x2c74b50, e=0x7fff06e15ad0) at kernel/qapplication.cpp:4056
#19 0x00007f1e339a0011 in QApplication::notify (this=<value optimized out>, receiver=0x2c74b50, e=0x7fff06e15ad0) at kernel/qapplication.cpp:3758
#20 0x00007f1e345cfab6 in KApplication::notify (this=0x7fff06e179f0, receiver=0x2c74b50, event=0x7fff06e15ad0) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x00007f1e33078c2c in QCoreApplication::notifyInternal (this=0x7fff06e179f0, receiver=0x2c74b50, event=0x7fff06e15ad0) at kernel/qcoreapplication.cpp:610
#22 0x00007f1e3399f8e0 in QCoreApplication::sendSpontaneousEvent (receiver=0x2c74b50, event=0x7fff06e15ad0, alienWidget=0x2c74b50, nativeWidget=0x291f7c0, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#23 QApplicationPrivate::sendMouseEvent (receiver=0x2c74b50, event=0x7fff06e15ad0, alienWidget=0x2c74b50, nativeWidget=0x291f7c0, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>) at kernel/qapplication.cpp:2924
#24 0x00007f1e33a05a0e in QETWidget::translateMouseEvent (this=0x291f7c0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4409
#25 0x00007f1e33a04aa9 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff06e17600) at kernel/qapplication_x11.cpp:3550
#26 0x00007f1e33a2dd0c in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#27 0x00007f1e2c8f2bbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#28 0x00007f1e2c8f6588 in ?? () from /lib/libglib-2.0.so.0
#29 0x00007f1e2c8f66b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#30 0x00007f1e330a11a6 in QEventDispatcherGlib::processEvents (this=0x25b9cb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#31 0x00007f1e33a2d4be in QGuiEventDispatcherGlib::processEvents (this=0x3fb5b78, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#32 0x00007f1e33077532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#33 0x00007f1e33077904 in QEventLoop::exec (this=0x7fff06e17930, flags=) at kernel/qeventloop.cpp:201
#34 0x00007f1e33079ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#35 0x0000000000403f47 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi