Version:           4.0 (using Devel)
Installed from:    Compiled sources
Compiler:          gcc 4.3 
OS:                Linux

With upgrading to KDE4 Beta2 KNotify crashes immediately after KDE startup and than repeatedly after launching several applications. The following backtrace was produced:

Application: KNotify (knotify4), signal SIGSEGV
[?1034h[Thread debugging using libthread_db enabled]
[New Thread 0xb691b6d0 (LWP 3007)]
[New Thread 0xaff62b90 (LWP 3019)]
[New Thread 0xb0b8fb90 (LWP 3018)]
[New Thread 0xb1602b90 (LWP 3016)]
[New Thread 0xb1e03b90 (LWP 3015)]
[New Thread 0xb27d1b90 (LWP 3014)]
[New Thread 0xb2fd2b90 (LWP 3013)]
[New Thread 0xb3815b90 (LWP 3012)]
[New Thread 0xb4016b90 (LWP 3009)]
[KCrash handler]
#6  0xb4acca5e in ?? () from /usr/lib/libxine.so.1
#7  0xb4b1f5cb in Phonon::Xine::XineThread::event ()
   from /usr/lib/kde4/phonon_xine.so
#8  0xb733eecc in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#9  0xb734531e in QApplication::notify () from /usr/lib/libQtGui.so.4
#10 0xb6f4406d in KApplication::notify () from /usr/lib/libkdeui.so.5
#11 0xb7c31bc1 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#12 0xb7c32481 in QCoreApplicationPrivate::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#13 0xb7c5a7ca in QEventDispatcherUNIX::processEvents ()
   from /usr/lib/libQtCore.so.4
#14 0xb7c3033a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#15 0xb7c304fa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#16 0xb7b54be3 in QThread::exec () from /usr/lib/libQtCore.so.4
#17 0xb4b1f318 in Phonon::Xine::XineThread::run ()
   from /usr/lib/kde4/phonon_xine.so
#18 0xb7b579b7 in ?? () from /usr/lib/libQtCore.so.4
#19 0xb7afb175 in start_thread () from /lib/libpthread.so.0
#20 0xb6b53dce in clone () from /lib/libc.so.6

Thread 5 (Thread 0xb1e03b90 (LWP 3015)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb7afec15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb4ad6f78 in ?? () from /usr/lib/libxine.so.1
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 4 (Thread 0xb1602b90 (LWP 3016)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb7afec15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb4ae8858 in ?? () from /usr/lib/libxine.so.1
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 3 (Thread 0xb0b8fb90 (LWP 3018)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb7afec15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb4ae576c in ?? () from /usr/lib/libxine.so.1
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 2 (Thread 0xaff62b90 (LWP 3019)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb7afef42 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0xb4ae1a7e in ?? () from /usr/lib/libxine.so.1
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 1 (Thread 0xb691b6d0 (LWP 3007)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb7afef42 in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#2  0xb7b5871c in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb7b577b4 in QThread::wait () from /usr/lib/libQtCore.so.4
#4  0xb4b22733 in Phonon::Xine::XineEngine::~XineEngine ()
   from /usr/lib/kde4/phonon_xine.so
#5  0xb4b37c6e in Phonon::Xine::Backend::~Backend ()
   from /usr/lib/kde4/phonon_xine.so
#6  0xb6d5dce7 in Phonon::FactoryPrivate::~FactoryPrivate ()
   from /usr/lib/libphonon.so.4
#7  0xb6d5cd25 in Phonon::._254::destroy () from /usr/lib/libphonon.so.4
#8  0xb6d450bb in Phonon::CleanUpGlobalStatic::~CleanUpGlobalStatic ()
   from /usr/lib/libphonon.so.4
#9  0xb6ab38f1 in exit () from /lib/libc.so.6
#10 0xb7396bbb in ?? () from /usr/lib/libQtGui.so.4
#11 0xb6f43a37 in KApplication::xioErrhandler () from /usr/lib/libkdeui.so.5
#12 0xb6f43a76 in kde_xio_errhandler () from /usr/lib/libkdeui.so.5
#13 0xb79ed322 in _XIOError () from /usr/lib/libX11.so.6
#14 0xb79f5385 in ?? () from /usr/lib/libX11.so.6
#15 0xb79f5ba5 in _XEventsQueued () from /usr/lib/libX11.so.6
#16 0xb79ddacf in XEventsQueued () from /usr/lib/libX11.so.6
#17 0xb73c944d in ?? () from /usr/lib/libQtGui.so.4
#18 0xb7c3033a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#19 0xb7c304fa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#20 0xb7c326dd in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#21 0xb733ed47 in QApplication::exec () from /usr/lib/libQtGui.so.4
#22 0x0804d42d in main ()
#0  0xffffe430 in __kernel_vsyscall ()