Application that crashed: kontact
Version of the application: 4.3.0
KDE Version: 4.3.00 (KDE 4.3.0) "release 155"
Qt Version: 4.5.2
Operating System: Linux 2.6.27.25-0.1-default x86_64
Distribution: "openSUSE 11.1 (x86_64)"

What I was doing when the application crashed:
After logout of a session with Kontact still active and starting a new session Kontact starts twice. After ending one, clicking on upper right cross, Kontact crashes.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f7c7c3a302c in KMFolder::noContent (this=<value optimized out>) at /usr/src/debug/kdepim-4.3.0/kmail/kmfolder.cpp:348
#6  0x00007f7c7c357bea in KMail::FolderViewItem::updateCounts (this=0x1c6a4b0) at /usr/src/debug/kdepim-4.3.0/kmail/folderview.cpp:2841
#7  0x00007f7c7c3580e8 in KMail::FolderView::updateCountsForChildren (this=0xa149a0, it=0x1c57910, tStart=@0x7fffd9323280) at /usr/src/debug/kdepim-4.3.0/kmail/folderview.cpp:865
#8  0x00007f7c7c358053 in KMail::FolderView::updateCountsForChildren (this=0xa149a0, it=0x1c57410, tStart=@0x7fffd9323280) at /usr/src/debug/kdepim-4.3.0/kmail/folderview.cpp:837
#9  0x00007f7c7c358053 in KMail::FolderView::updateCountsForChildren (this=0xa149a0, it=0x1c56f10, tStart=@0x7fffd9323280) at /usr/src/debug/kdepim-4.3.0/kmail/folderview.cpp:837
#10 0x00007f7c7c358053 in KMail::FolderView::updateCountsForChildren (this=0xa149a0, it=0x18f5f60, tStart=@0x7fffd9323280) at /usr/src/debug/kdepim-4.3.0/kmail/folderview.cpp:837
#11 0x00007f7c7c35815f in KMail::FolderView::slotUpdateCounts (this=0xa149a0) at /usr/src/debug/kdepim-4.3.0/kmail/folderview.cpp:898
#12 0x00007f7c7c3588c5 in KMail::FolderView::qt_metacall (this=0xa149a0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffd9323380)
    at /usr/src/debug/kdepim-4.3.0/build/kmail/folderview.moc:211
#13 0x00007f7c7c35b9f6 in KMail::MainFolderView::qt_metacall (this=0x7f7c904b0720, _c=10570144, _id=36488256, _a=0x7f7c7cb91a00) at /usr/src/debug/kdepim-4.3.0/build/kmail/mainfolderview.moc:64
#14 0x00007f7c901d16e2 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#15 0x00007f7c901cc533 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#16 0x00007f7c8eedbb0d in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#17 0x00007f7c8eee3d9a in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#18 0x00007f7c90ffb71b in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#19 0x00007f7c901bc94c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#20 0x00007f7c901e9b60 in ?? () from /usr/lib64/libQtCore.so.4
#21 0x00007f7c901e5ddd in ?? () from /usr/lib64/libQtCore.so.4
#22 0x00007f7c89a920fb in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#23 0x00007f7c89a958cd in ?? () from /usr/lib64/libglib-2.0.so.0
#24 0x00007f7c89a95a8b in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#25 0x00007f7c901e5d3f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#26 0x00007f7c8ef72fff in ?? () from /usr/lib64/libQtGui.so.4
#27 0x00007f7c901bb1d2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#28 0x00007f7c901bb5a4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#29 0x00007f7c901bd894 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#30 0x0000000000404995 in main (argc=3, argv=0x7fffd9324558) at /usr/src/debug/kdepim-4.3.0/kontact/src/main.cpp:218

This bug may be a duplicate of or related to bug 201193

Reported using DrKonqi