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

the actual kubuntu 8.10 with backports (kde4.1.3) enabled. It crashed also in KDE 4.1.2.

here is the crash-report:

Anwendung: KNotify (knotify4), Signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0x7f7fe9c706f0 (LWP 15330)]
[New Thread 0x423f1950 (LWP 15876)]
[KCrash handler]
#5  0x00007f7fe75ea690 in strlen () from /lib/libc.so.6
#6  0x00007f7fe75b344e in vfprintf () from /lib/libc.so.6
#7  0x00007f7fe7664d18 in __vsnprintf_chk () from /lib/libc.so.6
#8  0x00007f7fdefeefad in ?? () from /usr/lib/libxine.so.1
#9  0x00007f7fdefd19f4 in xine_log () from /usr/lib/libxine.so.1
#10 0x00007f7fdefdcecc in ?? () from /usr/lib/libxine.so.1
#11 0x00007f7fdf250fc2 in ?? () from /usr/lib/kde4/phonon_xine.so
#12 0x00007f7fdf2545dc in KPluginFactory::createInstance<Phonon::Xine::Backend, QObject> () from /usr/lib/kde4/phonon_xine.so
#13 0x00007f7fe9810845 in KPluginFactory::create (this=0x7728d0, 
    iface=0x7f7fe93cd040 "QObject", parentWidget=0x0, parent=0x0, 
    args=@0x7ffff1c9fa30, keyword=@0x7ffff1c9f910)
    at /build/buildd/kde4libs-4.1.3/kdecore/util/kpluginfactory.cpp:189
#14 0x00007f7fe0df85b9 in Phonon::KdePlatformPlugin::createBackend (
    this=<value optimized out>, newService={d = 0x7ffff1c9fb10})
    at /usr/include/kpluginfactory.h:515
#15 0x00007f7fe0df9f0d in Phonon::KdePlatformPlugin::createBackend (
    this=0x744320)
    at /build/buildd/kdebase-runtime-4.1.3/phonon/platform_kde/kdepluginfactory.cpp:199
#16 0x00007f7fe7c194c8 in ?? () from /usr/lib/libphonon.so.4
#17 0x00007f7fe7c1a407 in Phonon::Factory::backend ()
   from /usr/lib/libphonon.so.4
#18 0x00007f7fe7c15cf2 in ?? () from /usr/lib/libphonon.so.4
#19 0x00007f7fe7c1625d in ?? () from /usr/lib/libphonon.so.4
#20 0x00007f7fe7c106b0 in ?? () from /usr/lib/libphonon.so.4
#21 0x00007f7fe7c11341 in Phonon::AudioOutput::AudioOutput ()
   from /usr/lib/libphonon.so.4
#22 0x000000000040cab1 in PlayerPool::getPlayer (this=0x71a7e8)
    at /build/buildd/kdebase-runtime-4.1.3/knotify/notifybysound.cpp:57
#23 0x000000000040d0f6 in NotifyBySound::notify (this=0x71d100, eventId=15, 
    config=<value optimized out>)
    at /build/buildd/kdebase-runtime-4.1.3/knotify/notifybysound.cpp:233
#24 0x00000000004079da in KNotify::emitEvent (this=0x7ffff1ca13e0, e=0x71bdf0)
    at /build/buildd/kdebase-runtime-4.1.3/knotify/knotify.cpp:176
#25 0x00000000004080fc in KNotify::event (this=0x7ffff1ca13e0, 
    event=<value optimized out>, appname=<value optimized out>, 
    contexts=<value optimized out>, text=<value optimized out>, 
    pixmap=@0x7ffff1ca03d0, actions=@0x6e4a30, winId=52430621)
    at /build/buildd/kdebase-runtime-4.1.3/knotify/knotify.cpp:126
#26 0x0000000000408568 in KNotifyAdaptor::event (this=0x6e3170, 
    event=@0x6e4740, fromApp=@0x6e4720, contexts=<value optimized out>, 
    text=@0x6d4c60, image=@0x6e4690, actions=@0x6e4a30, winId=52430621)
    at /build/buildd/kdebase-runtime-4.1.3/knotify/knotify.cpp:235
#27 0x0000000000409208 in KNotifyAdaptor::qt_metacall (this=0x6e3170, 
    _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, 
    _a=0x7ffff1ca0740)
    at /build/buildd/kdebase-runtime-4.1.3/obj-x86_64-linux-gnu/knotify/knotify.moc:208
#28 0x00007f7fe844eea3 in ?? () from /usr/lib/libQtDBus.so.4
#29 0x00007f7fe84501b0 in ?? () from /usr/lib/libQtDBus.so.4
#30 0x00007f7fe8450791 in ?? () from /usr/lib/libQtDBus.so.4
#31 0x00007f7fe8450aa8 in ?? () from /usr/lib/libQtDBus.so.4
#32 0x00007f7fe9351da5 in QObject::event () from /usr/lib/libQtCore.so.4
#33 0x00007f7fe8864c3d in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#34 0x00007f7fe886c9ea in QApplication::notify () from /usr/lib/libQtGui.so.4
#35 0x00007f7fe8050fcb in KApplication::notify (this=0x7ffff1ca1410, 
    receiver=0x7ffff1ca13e0, event=0x6452c0)
    at /build/buildd/kde4libs-4.1.3/kdeui/kernel/kapplication.cpp:311
#36 0x00007f7fe9342d61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#37 0x00007f7fe93439fa in QCoreApplicationPrivate::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#38 0x00007f7fe936b4d3 in ?? () from /usr/lib/libQtCore.so.4
#39 0x00007f7fe679ed3b in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#40 0x00007f7fe67a250d in ?? () from /usr/lib/libglib-2.0.so.0
#41 0x00007f7fe67a26cb in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#42 0x00007f7fe936b15f in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#43 0x00007f7fe88f6a9f in ?? () from /usr/lib/libQtGui.so.4
#44 0x00007f7fe9341682 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#45 0x00007f7fe934180d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#46 0x00007f7fe9343cbd in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#47 0x0000000000406d3b in main (argc=1, argv=0x7ffff1ca1798)
    at /build/buildd/kdebase-runtime-4.1.3/knotify/main.cpp:73
#0  0x00007f7fe7610621 in nanosleep () from /lib/libc.so.6