Application: kmail (1.13.2)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32.11-pclos2.bfs i686
Distribution: "PCLinuxOS"

-- Information about the crash:
I was about to setup a K-Mail account, when the application crashed.
It also crashed when I tried to send email, no matter what I put in for FROM: address.

The crash can be reproduced every time.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  0xb45376db in MessageList::Utils::AggregationComboBox::~AggregationComboBox$base () from /usr/lib/libmessagelist.so.4
#7  0xb453798f in MessageList::Utils::AggregationComboBox::AggregationComboBox () from /usr/lib/libmessagelist.so.4
#8  0xb6ad2f31 in IdentityPage::slotRemoveIdentity () from /usr/lib/libkmailprivate.so.4
#9  0xb6ad40f6 in AppearancePage::AppearancePage () from /usr/lib/libkmailprivate.so.4
#10 0xb073346e in create_kmail_config_appearance () from /usr/lib/kde4/kcm_kmail.so
#11 0xb4458910 in KCModuleLoader::loadModule () from /usr/lib/libkutils.so.4
#12 0xb445d1f9 in KCModuleProxy::~KCModuleProxy$delete () from /usr/lib/libkutils.so.4
#13 0xb445def4 in KCModuleProxy::realModule () from /usr/lib/libkutils.so.4
#14 0xb445dfa2 in KCModuleProxy::useRootOnlyMessage () from /usr/lib/libkutils.so.4
#15 0xb445a4c4 in KCMultiDialog::addModule () from /usr/lib/libkutils.so.4
#16 0xb445b31a in KCMultiDialog::addModule () from /usr/lib/libkutils.so.4
#17 0xb6ab084a in IdentityPage::load () from /usr/lib/libkmailprivate.so.4
#18 0xb6cb02c6 in KMKernel::slotShowConfigurationDialog () from /usr/lib/libkmailprivate.so.4
#19 0xb6cbd266 in KMKernel::qt_metacall () from /usr/lib/libkmailprivate.so.4
#20 0xb5e9fabd in QMetaObject::metacall () from /usr/lib/libQtCore.so.4
#21 0xb5eae7fa in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb53a936d in QAction::triggered () from /usr/lib/libQtGui.so.4
#23 0xb53ab67c in QAction::activate () from /usr/lib/libQtGui.so.4
#24 0xb5861a07 in QMenu::icon () from /usr/lib/libQtGui.so.4
#25 0xb586814f in QMenu::timerEvent () from /usr/lib/libQtGui.so.4
#26 0xb5869188 in QMenu::mouseReleaseEvent () from /usr/lib/libQtGui.so.4
#27 0xb76cad9d in KMenu::mouseReleaseEvent () from /usr/lib/libkdeui.so.5
#28 0xb5410b3b in QWidget::event () from /usr/lib/libQtGui.so.4
#29 0xb586a73c in QMenu::event () from /usr/lib/libQtGui.so.4
#30 0xb53afe0c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#31 0xb53b761e in QApplication::notify () from /usr/lib/libQtGui.so.4
#32 0xb75cdcd1 in KApplication::notify () from /usr/lib/libkdeui.so.5
#33 0xb5e9a74e in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#34 0xb53b6564 in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#35 0xb5444779 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#36 0xb54438b5 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#37 0xb54710d0 in QX11Info::copyX11Data () from /usr/lib/libQtGui.so.4
#38 0xb345ea3e in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#39 0xb3462768 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#40 0xb346290e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#41 0xb5ec7181 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#42 0xb5470c4a in QX11Info::copyX11Data () from /usr/lib/libQtGui.so.4
#43 0xb5e98dbd in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#44 0xb5e99209 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#45 0xb5e9d380 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#46 0xb53afeb4 in QApplication::exec () from /usr/lib/libQtGui.so.4
#47 0x0804a96e in _start ()
#48 0xb4ea4a36 in __libc_start_main () from /lib/i686/libc.so.6
#49 0x08049ca1 in _start ()

Reported using DrKonqi