Application: kded4 ($Id: kded.cpp 1156841 2010-07-29 19:59:05Z zander $)
KDE Platform Version: 4.5.1 (KDE 4.5.1) "release 3"
Qt Version: 4.6.3
Operating System: Linux 2.6.34.4-11-desktop i686
Distribution: "openSUSE 11.3 (i586)"

-- Information about the crash:
- What I was doing when the application crashed:

After the Login KDED crash. I tray to start in manualy and get this output:
QDBusObjectPath: invalid path ""
KCrash: Attempting to start /usr/bin/kded4 from kdeinit
sock_file=/home/johann/.kde4/socket-andrea_j/kdeinit4__0
KCrash: Application 'kded4' crashing...
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit
sock_file=/home/johann/.kde4/socket-andrea_j/kdeinit4__0
kded(7610): Communication problem with  "kded" , it probably crashed. 
Error message was:  "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" "

run kded4 --check seems to fix the triger of the bug
kded still report a lot of problems:
QDBusObjectPath: invalid path ""
Object::connect: No such signal ObexFtpDaemon::SessionConnected(QDBusObjectPath)
Object::connect: No such signal ObexFtpDaemon::SessionClosed(QDBusObjectPath)
Fetched layout groups from X server:    layouts: ("de")         variants: ("nodeadkeys")
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
QFSFileEngine::open: No file name specified
Invalid D-BUS member name 'idle-hint' found in interface 'org.freedesktop.ConsoleKit.Session' while parsing introspection
Invalid D-BUS member name 'is-local' found in interface 'org.freedesktop.ConsoleKit.Session' while parsing introspection
Invalid D-BUS member name 'x11-display-device' found in interface 'org.freedesktop.ConsoleKit.Session' while parsing introspection
Invalid D-BUS member name 'x11-display' found in interface 'org.freedesktop.ConsoleKit.Session' while parsing introspection
Invalid D-BUS member name 'display-device' found in interface 'org.freedesktop.ConsoleKit.Session' while parsing introspection
Invalid D-BUS member name 'remote-host-name' found in interface 'org.freedesktop.ConsoleKit.Session' while parsing introspection
Invalid D-BUS member name 'session-type' found in interface 'org.freedesktop.ConsoleKit.Session' while parsing introspection
Invalid D-BUS member name 'unix-user' found in interface 'org.freedesktop.ConsoleKit.Session' while parsing introspection
QDBusObjectPath: invalid path ""
QObject::connect: Cannot connect (null)::deviceCreated(Device*) to Monolithic::deviceCreated(Device*)
QObject::connect: Cannot connect (null)::deviceDisappeared(Device*) to Monolithic::regenerateDeviceEntries()
QObject::connect: Cannot connect (null)::deviceRemoved(Device*) to Monolithic::regenerateDeviceEntries()
Object::disconnect: Unexpected null parameter
Object::disconnect: Unexpected null parameter
Object::disconnect: Unexpected null parameter

The crash can be reproduced every time.

-- Backtrace:
Application: KDE-Dienst (kded4), signal: Segmentation fault
[KCrash Handler]
#7  QObject::connect (sender=0xffffffff, signal=0xb29f35fc "2SessionConnected(QDBusObjectPath)", receiver=0x824e468, method=0xb29f35d8 "1SessionConnected(QDBusObjectPath)", type=Qt::AutoConnection)
    at kernel/qobject.cpp:2518
#8  0xb29e7620 in ObexFtpDaemon::ObexFtpDaemon(QObject*, QList<QVariant> const&) () from /usr/lib/kde4/kded_obexftpdaemon.so
#9  0xb29ed07a in QObject* KPluginFactory::createInstance<ObexFtpDaemon, QObject>(QWidget*, QObject*, QList<QVariant> const&) () from /usr/lib/kde4/kded_obexftpdaemon.so
#10 0xb6ecc750 in KPluginFactory::create (this=0x81b46b8, iface=0xb6fc1f60 "KDEDModule", parentWidget=0x0, parent=0x80653b8, args=..., keyword=...)
    at /usr/src/debug/kdelibs-4.5.1/kdecore/util/kpluginfactory.cpp:191
#11 0xb76cdb3c in create<KDEDModule> (this=0x80653b8, s=..., onDemand=false) at /usr/src/debug/kdelibs-4.5.1/kdecore/util/kpluginfactory.h:491
#12 Kded::loadModule (this=0x80653b8, s=..., onDemand=false) at /usr/src/debug/kdelibs-4.5.1/kded/kded.cpp:381
#13 0xb76cf260 in Kded::initModules (this=0x80653b8) at /usr/src/debug/kdelibs-4.5.1/kded/kded.cpp:239
#14 0xb76d1e16 in KDEDApplication::newInstance (this=0xbf8e9120) at /usr/src/debug/kdelibs-4.5.1/kded/kded.cpp:818
#15 0xb7271123 in KUniqueApplicationAdaptor::newInstance (this=0x80e8c78, asn_id=..., args=...) at /usr/src/debug/kdelibs-4.5.1/kdeui/kernel/kuniqueapplication.cpp:440
#16 0xb72711dc in KUniqueApplicationAdaptor::qt_metacall (this=0x80e8c78, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbf8e86ec)
    at /usr/src/debug/kdelibs-4.5.1/build/kdeui/kuniqueapplication_p.moc:81
#17 0xb6d3da37 in QDBusConnectionPrivate::deliverCall (this=0x806a650, object=0x80e8c78, msg=..., metaTypes=..., slotIdx=1) at qdbusintegrator.cpp:904
#18 0xb6d3fbe7 in QDBusConnectionPrivate::activateCall (this=0x806a650, object=0x80e8c78, flags=337, msg=...) at qdbusintegrator.cpp:809
#19 0xb6d40378 in QDBusConnectionPrivate::activateObject (this=0x806a650, node=..., msg=..., pathStartPos=135188656) at qdbusintegrator.cpp:1383
#20 0xb6d40878 in QDBusActivateObjectEvent::placeMetaCall (this=0x80ec818) at qdbusintegrator.cpp:1477
#21 0xb6c1593f in QObject::event (this=0xbf8e9120, e=0x80ec818) at kernel/qobject.cpp:1248
#22 0xb6c033ea in QCoreApplication::event (this=0xbf8e9120, e=0x80ec818) at kernel/qcoreapplication.cpp:1555
#23 0xb6159578 in QApplication::event (this=0xbf8e9120, e=0x80ec818) at kernel/qapplication.cpp:2355
#24 0xb6157c64 in QApplicationPrivate::notify_helper (this=0x806d830, receiver=0xbf8e9120, e=0x80ec818) at kernel/qapplication.cpp:4302
#25 0xb615fbf7 in QApplication::notify (this=0xbf8e9120, receiver=0xbf8e9120, e=0x80ec818) at kernel/qapplication.cpp:3706
#26 0xb715f361 in KApplication::notify (this=0xbf8e9120, receiver=0xbf8e9120, event=0x80ec818) at /usr/src/debug/kdelibs-4.5.1/kdeui/kernel/kapplication.cpp:310
#27 0xb6c02e0e in QCoreApplication::notifyInternal (this=0xbf8e9120, receiver=0xbf8e9120, event=0x80ec818) at kernel/qcoreapplication.cpp:726
#28 0xb6c069b4 in sendEvent (receiver=0x0, event_type=0, data=0x804b368) at kernel/qcoreapplication.h:215
#29 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x804b368) at kernel/qcoreapplication.cpp:1367
#30 0xb6c06b9c in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1260
#31 0xb6c2e83d in sendPostedEvents (s=0x806fd10) at kernel/qcoreapplication.h:220
#32 postEventSourceDispatch (s=0x806fd10) at kernel/qeventdispatcher_glib.cpp:276
#33 0xb5b26b49 in g_main_dispatch (context=0x806fc90) at gmain.c:1960
#34 IA__g_main_context_dispatch (context=0x806fc90) at gmain.c:2513
#35 0xb5b27350 in g_main_context_iterate (context=0x806fc90, block=1, dispatch=1, self=0x806db08) at gmain.c:2591
#36 0xb5b2760e in IA__g_main_context_iteration (context=0x806fc90, may_block=1) at gmain.c:2654
#37 0xb6c2ed4b in QEventDispatcherGlib::processEvents (this=0x804ed78, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#38 0xb620819a in QGuiEventDispatcherGlib::processEvents (this=0x804ed78, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#39 0xb6c0211d in QEventLoop::processEvents (this=0xbf8e9084, flags=...) at kernel/qeventloop.cpp:149
#40 0xb6c02319 in QEventLoop::exec (this=0xbf8e9084, flags=...) at kernel/qeventloop.cpp:201
#41 0xb6c06c70 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1003
#42 0xb6155164 in QApplication::exec () at kernel/qapplication.cpp:3581
#43 0xb76cd1bd in kdemain (argc=1, argv=0xbf8e9334) at /usr/src/debug/kdelibs-4.5.1/kded/kded.cpp:894
#44 0x0804860b in main (argc=1, argv=0xbf8e9334) at /usr/src/debug/kdelibs-4.5.1/build/kded/kded4_dummy.cpp:3

Reported using DrKonqi