Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-desktop586-1mnb i686
Distribution: "Mandriva Linux 2010.0"

What I was doing when the application crashed:
At start it is telling me that another instance of Kontact is already running, but none can be seen.This happens at least often.Most of the time it happens when i switch to another application such as Firefox.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb0636264 in KMKernel::config () from /usr/lib/libkmailprivate.so.4
#7  0xb06363b2 in KMKernel::slotRunBackgroundTasks () from /usr/lib/libkmailprivate.so.4
#8  0xb0645d12 in KMKernel::qt_metacall () from /usr/lib/libkmailprivate.so.4
#9  0xb7016144 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0xb7016e65 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb7051a15 in QTimer::timeout () from /usr/lib/libQtCore.so.4
#12 0xb701ba76 in QTimer::timerEvent () from /usr/lib/libQtCore.so.4
#13 0xb700fdfb in QObject::event () from /usr/lib/libQtCore.so.4
#14 0xb662668c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#15 0xb662e0ce in QApplication::notify () from /usr/lib/libQtGui.so.4
#16 0xb753a9e1 in KApplication::notify () from /usr/lib/libkdeui.so.5
#17 0xb6fffc0e in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#18 0xb702e2c1 in ?? () from /usr/lib/libQtCore.so.4
#19 0xb702bc05 in ?? () from /usr/lib/libQtCore.so.4
#20 0xb4958b92 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0xb495c468 in ?? () from /usr/lib/libglib-2.0.so.0
#22 0xb495c58e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0xb702b8f1 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#24 0xb66c84ba in ?? () from /usr/lib/libQtGui.so.4
#25 0xb6ffe26d in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#26 0xb6ffe6b9 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#27 0xb7000b50 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#28 0xb6626504 in QApplication::exec () from /usr/lib/libQtGui.so.4
#29 0x0804b1c6 in _start ()

This bug may be a duplicate of or related to bug 204901

Reported using DrKonqi