Application that crashed: kontact
Version of the application: 4.3.0 rc2
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.2
Operating System: Linux 2.6.29-1-amd64 x86_64
Distribution: Debian GNU/Linux 5.0.2 (lenny)

What I was doing when the application crashed:
Kontact had crashed when I did click on an inbox to open it.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  KMail::FolderView::slotFolderExpanded (this=<value optimized out>, item=<value optimized out>) at ../../kmail/folderview.cpp:2462
#6  0x00007fa598bdd50a in KMail::FolderView::qt_metacall (this=0x23912e0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb983cc20) at ./folderview.moc:222
#7  0x00007fa598be05e6 in KMail::MainFolderView::qt_metacall (this=0x7fa5af095a00, _c=2934325104, _id=0, _a=0x0) at ./mainfolderview.moc:64
#8  0x00007fa5b011d602 in QMetaObject::activate (sender=0x23912e0, from_signal_index=<value optimized out>, to_signal_index=101, argv=0x0) at kernel/qobject.cpp:3112
#9  0x00007fa5afad6052 in QTreeWidget::itemExpanded (this=0x7fa5af095a00, _t1=0x2dc9410) at .moc/release-shared/moc_qtreewidget.cpp:236
#10 0x00007fa5afae2e8f in QTreeWidget::qt_metacall (this=0x23912e0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb983ce00) at .moc/release-shared/moc_qtreewidget.cpp:149
#11 0x00007fa5b0f118e5 in KPIM::TreeWidget::qt_metacall (this=0x7fa5af095a00, _c=2934325104, _id=0, _a=0x0) at moc_treewidget.cpp:68
#12 0x00007fa5b0f6b406 in KPIM::FolderTreeWidget::qt_metacall (this=0x7fa5af095a00, _c=2934325104, _id=0, _a=0x0) at ./foldertreewidget.moc:68
#13 0x00007fa598bdd4a5 in KMail::FolderView::qt_metacall (this=0x7fa5af095a00, _c=2934325104, _id=0, _a=0x0) at ./folderview.moc:188
#14 0x00007fa598be05e6 in KMail::MainFolderView::qt_metacall (this=0x7fa5af095a00, _c=2934325104, _id=0, _a=0x0) at ./mainfolderview.moc:64
#15 0x00007fa5b011d602 in QMetaObject::activate (sender=0x23912e0, from_signal_index=<value optimized out>, to_signal_index=69, argv=0x0) at kernel/qobject.cpp:3112
#16 0x00007fa5afa980a2 in QTreeView::expanded (this=0x7fa5af095a00, _t1=<value optimized out>) at .moc/release-shared/moc_qtreeview.cpp:213
#17 0x00007fa5afaa8711 in QTreeViewPrivate::expand (this=0x23913a0, item=7, emitSignal=true) at itemviews/qtreeview.cpp:2889
#18 0x00007fa5afaa9990 in QTreeViewPrivate::expandOrCollapseItemAtPos (this=0x23913a0, pos=<value optimized out>) at itemviews/qtreeview.cpp:1326
#19 0x00007fa5afaa9b3b in QTreeView::mousePressEvent (this=0x23912e0, event=0x7fffb983dce0) at itemviews/qtreeview.cpp:1784
#20 0x00007fa5af5d0cc6 in QWidget::event (this=0x23912e0, event=0x7fffb983dce0) at kernel/qwidget.cpp:7545
#21 0x00007fa5af939c7b in QFrame::event (this=0x23912e0, e=0x7fffb983dce0) at widgets/qframe.cpp:559
#22 0x00007fa5afa6c71b in QAbstractItemView::viewportEvent (this=0x23912e0, event=0x7fffb983dce0) at itemviews/qabstractitemview.cpp:1476
#23 0x00007fa5afaa4489 in QTreeView::viewportEvent (this=0x23912e0, event=0x7fffb983dce0) at itemviews/qtreeview.cpp:1266
#24 0x00007fa5b01077b8 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x22c9250, event=0x7fffb983dce0) at kernel/qcoreapplication.cpp:726
#25 0x00007fa5af58077c in QApplicationPrivate::notify_helper (this=0x208ca90, receiver=0x22c9250, e=0x7fffb983dce0) at kernel/qapplication.cpp:4052
#26 0x00007fa5af588f5a in QApplication::notify (this=<value optimized out>, receiver=0x22c9250, e=0x7fffb983dce0) at kernel/qapplication.cpp:3758
#27 0x00007fa5b0aa2a1b in KApplication::notify (this=0x7fffb983fb80, receiver=0x22c9250, event=0x7fffb983dce0) at ../../kdeui/kernel/kapplication.cpp:302
#28 0x00007fa5b010849c in QCoreApplication::notifyInternal (this=0x7fffb983fb80, receiver=0x22c9250, event=0x7fffb983dce0) at kernel/qcoreapplication.cpp:610
#29 0x00007fa5af588208 in QCoreApplication::sendSpontaneousEvent (receiver=0x22c9250, event=0x7fffb983dce0, alienWidget=0x22c9250, nativeWidget=0x21cb070, buttonDown=<value optimized out>, 
    lastMouseReceiver=...) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#30 QApplicationPrivate::sendMouseEvent (receiver=0x22c9250, event=0x7fffb983dce0, alienWidget=0x22c9250, nativeWidget=0x21cb070, buttonDown=<value optimized out>, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#31 0x00007fa5af5f0d99 in QETWidget::translateMouseEvent (this=0x21cb070, event=<value optimized out>) at kernel/qapplication_x11.cpp:4409
#32 0x00007fa5af5efb4f in QApplication::x11ProcessEvent (this=0x7fffb983fb80, event=0x7fffb983f6b0) at kernel/qapplication_x11.cpp:3550
#33 0x00007fa5af617e3c in x11EventSourceDispatch (s=0x207a9e0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#34 0x00007fa5a94abf7a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0x00007fa5a94af640 in ?? () from /usr/lib/libglib-2.0.so.0
#36 0x00007fa5a94af7dc in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0x00007fa5b0130b7f in QEventDispatcherGlib::processEvents (this=0x204fda0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#38 0x00007fa5af6175ef in QGuiEventDispatcherGlib::processEvents (this=0x7fa5af095a00, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#39 0x00007fa5b0106d62 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#40 0x00007fa5b0107134 in QEventLoop::exec (this=0x7fffb983f9e0, flags=...) at kernel/qeventloop.cpp:201
#41 0x00007fa5b01093a4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#42 0x0000000000404751 in main (argc=1, argv=0x7fffb9840158) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi