Version:            (using KDE 4.1.3)
Installed from:    Ubuntu Packages

I got this crash in kded. I've not been able to reproduce it so far.

Application: KDE Daemon (kded4), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0xb61998d0 (LWP 14162)]
[KCrash handler]
#6  0xb7cbc2a4 in QString::operator== () from /usr/lib/libQtCore.so.4
#7  0xb752cead in KDirWatchPrivate::inotifyEventReceived (this=0x8c42dc8)
    at /build/buildd/kde4libs-4.1.3/kio/kio/kdirwatch.cpp:288
#8  0xb752d15b in KDirWatchPrivate::qt_metacall (this=0x8c42dc8, 
    _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfaef32c)
    at /build/buildd/kde4libs-4.1.3/obj-i486-linux-gnu/kio/kdirwatch_p.moc:74
#9  0xb7d7fa60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0xb7d807e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb7dba633 in QSocketNotifier::activated () from /usr/lib/libQtCore.so.4
#12 0xb7d85637 in QSocketNotifier::event () from /usr/lib/libQtCore.so.4
#13 0xb6afb8ec in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#14 0xb6b0372e in QApplication::notify () from /usr/lib/libQtGui.so.4
#15 0xb786db2d in KApplication::notify (this=0xbfaef9c0, receiver=0x8c431a8, 
    event=0xbfaef6f0)
    at /build/buildd/kde4libs-4.1.3/kdeui/kernel/kapplication.cpp:311
#16 0xb7d6ae61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#17 0xb7d9570a in ?? () from /usr/lib/libQtCore.so.4
#18 0xb682e6f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#19 0xb6831da3 in ?? () from /usr/lib/libglib-2.0.so.0
#20 0xb6831f61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#21 0xb7d95478 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#22 0xb6b95ea5 in ?? () from /usr/lib/libQtGui.so.4
#23 0xb7d6952a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#24 0xb7d696ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#25 0xb7d6bda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#26 0xb6afb767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#27 0xb7fbc0a6 in kdemain (argc=1, argv=0xbfaefc54)
    at /build/buildd/kde4libs-4.1.3/kded/kded.cpp:847
#28 0x080485a2 in main (argc=147192936, argv=0x8c97bf8)
    at /build/buildd/kde4libs-4.1.3/obj-i486-linux-gnu/kded/kded4_dummy.cpp:3
#0  0xb7ff0430 in __kernel_vsyscall ()