Version:            (using KDE 4.2.1)
OS:                Linux
Installed from:    Ubuntu Packages

I think it crashed will I was trying to open a mail in my outbox ... 

Application : Kontact (kontact), signal SIGABRT
[Current thread is 0 (LWP 6355)]

Thread 2 (Thread 0xafb93b90 (LWP 6379)):
#0  0xb7f02430 in __kernel_vsyscall ()
#1  0xb5982df1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb5c51150 in ?? () from /usr/lib/libQtCore.so.4
#3  0xb5b816ae in ?? () from /usr/lib/libQtCore.so.4
#4  0xb52b950f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb598aa0e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb4a366c0 (LWP 6355)):
[KCrash Handler]
#6  0xb7f02430 in __kernel_vsyscall ()
#7  0xb58d48a0 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb58d6268 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb5b79795 in qt_message_output () from /usr/lib/libQtCore.so.4
#10 0xb5b79872 in qFatal () from /usr/lib/libQtCore.so.4
#11 0xb5b79915 in qt_assert () from /usr/lib/libQtCore.so.4
#12 0xb134697b in KMail::MessageListView::StorageModel::message (this=0xe137b60, row=0) at /build/buildd/kdepim-4.2.1/kmail/messagelistview/storagemodel.cpp:209
#13 0xb134b7df in KMail::MessageListView::Widget::viewMessageActivated (this=0xa4f3870, msg=0xb29a920) at /build/buildd/kdepim-4.2.1/kmail/messagelistview/widget.cpp:193
#14 0xb13a53b8 in KMail::MessageListView::Core::View::mouseDoubleClickEvent (this=0x9b68248, e=0xbfe033a8) at /build/buildd/kdepim-4.2.1/kmail/messagelistview/core/view.cpp:1621
#15 0xb617c7b2 in QWidget::event () from /usr/lib/libQtGui.so.4
#16 0xb64b3fd3 in QFrame::event () from /usr/lib/libQtGui.so.4
#17 0xb654a7df in QAbstractScrollArea::viewportEvent () from /usr/lib/libQtGui.so.4
#18 0xb65f5ccf in QAbstractItemView::viewportEvent () from /usr/lib/libQtGui.so.4
#19 0xb662d9e4 in QTreeView::viewportEvent () from /usr/lib/libQtGui.so.4
#20 0xb654cd85 in ?? () from /usr/lib/libQtGui.so.4
#21 0xb5c7104a in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#22 0xb61248ca in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#23 0xb612d0e1 in QApplication::notify () from /usr/lib/libQtGui.so.4
#24 0xb6c3e10d in KApplication::notify (this=0xbfe03c78, receiver=0x9b68730, event=0xbfe033a8) at /build/buildd/kde4libs-4.2.1a/kdeui/kernel/kapplication.cpp:307
#25 0xb5c71e61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#26 0xb612c36e in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#27 0xb6196656 in ?? () from /usr/lib/libQtGui.so.4
#28 0xb61959e5 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#29 0xb61bf7aa in ?? () from /usr/lib/libQtGui.so.4
#30 0xb4f4d718 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#31 0xb4f50dc3 in ?? () from /usr/lib/libglib-2.0.so.0
#32 0xb4f50f81 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#33 0xb5c9c478 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#34 0xb61beea5 in ?? () from /usr/lib/libQtGui.so.4
#35 0xb5c7052a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#36 0xb5c706ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#37 0xb5c72da5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#38 0xb6124767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#39 0x0804c072 in main (argc=1, argv=0xbfe03f74) at /build/buildd/kdepim-4.2.1/kontact/src/main.cpp:218