Application: kmail (1.13.2)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-22-generic x86_64
Distribution: Ubuntu 10.04 LTS

-- Information about the crash:
I did not have an email account set up in Kontact yet and this is a fresh install of Kubuntu 10.04 x64 and I clicked on an email link on a website in FIrefox, then within a few seconds, while I was trying to set up an  email, Kontact just crashed.

If you need anymore info, please let me know.  Just send me an email to the email account registered there.

I hope this helps!

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f8a433b1820 (LWP 2313))]

Thread 2 (Thread 0x7f8a23f64710 (LWP 2364)):
#0  0x00007f8a3feb9f53 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f8a378674a9 in ?? () from /lib/libglib-2.0.so.0
#2  0x00007f8a378678fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3  0x00007f8a40824566 in QEventDispatcherGlib::processEvents (this=0x2257890, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#4  0x00007f8a407f9992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5  0x00007f8a407f9d6c in QEventLoop::exec (this=0x7f8a23f63cf0, flags=) at kernel/qeventloop.cpp:201
#6  0x00007f8a40703d59 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#7  0x00007f8a407da178 in QInotifyFileSystemWatcherEngine::run (this=0x2649190) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f8a40706775 in QThreadPrivate::start (arg=0x2649190) at thread/qthread_unix.cpp:248
#9  0x00007f8a3e3109ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#10 0x00007f8a3fec66cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8a433b1820 (LWP 2313)):
[KCrash Handler]
#5  QHash<QString, MessageList::Core::Aggregation*>::begin (this=<value optimized out>) at /usr/include/qt4/QtCore/qhash.h:460
#6  QHash<QString, MessageList::Core::Aggregation*>::values (this=<value optimized out>) at /usr/include/qt4/QtCore/qhash.h:690
#7  MessageList::Utils::AggregationComboBoxPrivate::slotLoadAggregations (this=<value optimized out>) at ../../messagelist/utils/aggregationcombobox.cpp:93
#8  0x00007f8a3bdd0899 in AggregationComboBox (this=0x28f4350, parent=<value optimized out>) at ../../messagelist/utils/aggregationcombobox.cpp:35
#9  0x00007f8a41ca036e in AppearancePageHeadersTab (this=0x28f7b50, parent=<value optimized out>) at ../../kmail/configuredialog.cpp:1606
#10 0x00007f8a41ca1241 in AppearancePage (this=0x28748d0, instance=<value optimized out>, parent=<value optimized out>) at ../../kmail/configuredialog.cpp:1128
#11 0x00007f8a235627b7 in create_kmail_config_appearance (parent=0x28064d0) at ../../kmail/kcm_kmail.cpp:49
#12 0x00007f8a3b262664 in KCModuleLoader::loadModule (mod=..., report=KCModuleLoader::Inline, parent=0x28064d0, args=<value optimized out>) at ../../kutils/kcmoduleloader.cpp:111
#13 0x00007f8a3b2668e9 in KCModuleProxyPrivate::loadModule (this=0x28065f0) at ../../kutils/kcmoduleproxy.cpp:106
#14 0x00007f8a3b267415 in KCModuleProxy::realModule (this=<value optimized out>) at ../../kutils/kcmoduleproxy.cpp:83
#15 0x00007f8a3b267489 in KCModuleProxy::useRootOnlyMessage (this=0x28f93f0) at ../../kutils/kcmoduleproxy.cpp:315
#16 0x00007f8a3b263d0e in KCMultiDialog::addModule (this=0x2793270, moduleInfo=..., parentItem=<value optimized out>, args=<value optimized out>) at ../../kutils/kcmultidialog.cpp:340
#17 0x00007f8a3b264b6e in KCMultiDialog::addModule (this=0x2793270, path=<value optimized out>, args=...) at ../../kutils/kcmultidialog.cpp:321
#18 0x00007f8a41c82879 in ConfigureDialog (this=0x2793270, parent=<value optimized out>, modal=<value optimized out>) at ../../kmail/configuredialog.cpp:212
#19 0x00007f8a41e4b239 in KMKernel::slotShowConfigurationDialog (this=0x7fff9ffd62f0) at ../../kmail/kmkernel.cpp:2014
#20 0x00007f8a41e56f96 in KMKernel::qt_metacall (this=0x7fff9ffd62f0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff9ffd49f0) at ./kmkernel.moc:241
#21 0x00007f8a4080de3f in QMetaObject::activate (sender=0x2416d50, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7f8a40b0f0d0) at kernel/qobject.cpp:3293
#22 0x00007f8a40cc8032 in QAction::triggered (this=0x28f93f0, _t1=false) at .moc/release-shared/moc_qaction.cpp:263
#23 0x00007f8a40cca0ab in QAction::activate (this=0x2416d50, event=<value optimized out>) at kernel/qaction.cpp:1255
#24 0x00007f8a4110939d in QMenuPrivate::activateCausedStack (this=<value optimized out>, causedStack=..., action=0x2416d50, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1011
#25 0x00007f8a4110edda in QMenuPrivate::activateAction (this=0x2496840, action=0x2416d50, action_e=QAction::Trigger, self=<value optimized out>) at widgets/qmenu.cpp:1103
#26 0x00007f8a42eaccee in KMenu::mouseReleaseEvent (this=0x248a630, e=0xffffffff) at ../../kdeui/widgets/kmenu.cpp:471
#27 0x00007f8a40d24582 in QWidget::event (this=0x248a630, event=0x7fff9ffd5640) at kernel/qwidget.cpp:7998
#28 0x00007f8a41110f9b in QMenu::event (this=0x248a630, e=0x7fff9ffd5640) at widgets/qmenu.cpp:2414
#29 0x00007f8a40cce22c in QApplicationPrivate::notify_helper (this=0x1faba00, receiver=0x248a630, e=0x7fff9ffd5640) at kernel/qapplication.cpp:4300
#30 0x00007f8a40cd4ecb in QApplication::notify (this=0x7fff9ffd6460, receiver=0x248a630, e=0x7fff9ffd5640) at kernel/qapplication.cpp:3865
#31 0x00007f8a42dd0526 in KApplication::notify (this=0x7fff9ffd6460, receiver=0x248a630, event=0x7fff9ffd5640) at ../../kdeui/kernel/kapplication.cpp:302
#32 0x00007f8a407fb06c in QCoreApplication::notifyInternal (this=0x7fff9ffd6460, receiver=0x248a630, event=0x7fff9ffd5640) at kernel/qcoreapplication.cpp:704
#33 0x00007f8a40cd40ae in QCoreApplication::sendEvent (receiver=0x248a630, event=0x7fff9ffd5640, alienWidget=0x0, nativeWidget=0x248a630, buttonDown=<value optimized out>, 
    lastMouseReceiver=<value optimized out>, spontaneous=true) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#34 QApplicationPrivate::sendMouseEvent (receiver=0x248a630, event=0x7fff9ffd5640, alienWidget=0x0, nativeWidget=0x248a630, buttonDown=<value optimized out>, lastMouseReceiver=<value optimized out>, 
    spontaneous=true) at kernel/qapplication.cpp:2965
#35 0x00007f8a40d543dd in QETWidget::translateMouseEvent (this=0x248a630, event=<value optimized out>) at kernel/qapplication_x11.cpp:4302
#36 0x00007f8a40d528ac in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff9ffd5f60) at kernel/qapplication_x11.cpp:3501
#37 0x00007f8a40d7e882 in x11EventSourceDispatch (s=0x1faf230, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#38 0x00007f8a378638c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#39 0x00007f8a37867748 in ?? () from /lib/libglib-2.0.so.0
#40 0x00007f8a378678fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#41 0x00007f8a40824513 in QEventDispatcherGlib::processEvents (this=0x1f73000, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#42 0x00007f8a40d7e46e in QGuiEventDispatcherGlib::processEvents (this=0x28f93f0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#43 0x00007f8a407f9992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#44 0x00007f8a407f9d6c in QEventLoop::exec (this=0x7fff9ffd6290, flags=) at kernel/qeventloop.cpp:201
#45 0x00007f8a407fdaab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#46 0x0000000000403482 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:156

Reported using DrKonqi