Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

I upgrade the Kubuntu's distribution from 8.10 to 9.04. After that, amarok doesn't start. This is the report from the kde's fail manager:

Aplicación: Amarok (amarok), señal SIGSEGV
[Current thread is 0 (LWP 9995)]

Thread 9 (Thread 0xb16c5b90 (LWP 9996)):
#0  0xb8021430 in __kernel_vsyscall ()
#1  0xb7896412 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb255aae3 in ?? () from /usr/lib/libxine.so.1

Thread 8 (Thread 0xb0e47b90 (LWP 9997)):
#0  0xb44d15e2 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#1  0xb44d1fdd in ?? () from /usr/lib/libglib-2.0.so.0
#2  0xb44d2268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0xb6ad5457 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#4  0xb6aa806a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#5  0xb6aa84aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#6  0xb69b2639 in QThread::exec () from /usr/lib/libQtCore.so.4
#7  0xb25a820a in ?? () from /usr/lib/kde4/plugins/phonon_backend/phonon_xine.so
#8  0xb69b596e in ?? () from /usr/lib/libQtCore.so.4
#9  0xb78924ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#10 0xb67bb49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 7 (Thread 0xb0646b90 (LWP 10000)):
#0  0xb8021430 in __kernel_vsyscall ()
#1  0xb67b0ae7 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb0ebeb19 in ?? () from /usr/lib/xine/plugins/1.26/xineplug_ao_out_alsa.so
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 6 (Thread 0xafe45b90 (LWP 10001)):
#0  0xb8021430 in __kernel_vsyscall ()
#1  0xb78960e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb256bd8e in ?? () from /usr/lib/libxine.so.1
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Thread 5 (Thread 0xaf433b90 (LWP 10003)):
#0  0xb8021430 in __kernel_vsyscall ()
#1  0xb67b37b1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb6a87380 in ?? () from /usr/lib/libQtCore.so.4
#3  0xb69b596e in ?? () from /usr/lib/libQtCore.so.4
#4  0xb78924ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb67bb49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 4 (Thread 0xadb62b90 (LWP 10005)):
#0  0xb8021430 in __kernel_vsyscall ()
#1  0xb78960e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb69b69b2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb5e16148 in ?? () from /usr/lib/libthreadweaver.so.4
#4  0xb5e18eec in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5e14d2b in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb5e18fea in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5e166d3 in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb5e19009 in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb5e166d3 in ?? () from /usr/lib/libthreadweaver.so.4
#10 0xb5e19009 in ?? () from /usr/lib/libthreadweaver.so.4
#11 0xb5e166d3 in ?? () from /usr/lib/libthreadweaver.so.4
#12 0xb5e16fbe in ?? () from /usr/lib/libthreadweaver.so.4
#13 0xb5e175fb in ThreadWeaver::Thread::run () from /usr/lib/libthreadweaver.so.4
#14 0xb69b596e in ?? () from /usr/lib/libQtCore.so.4
#15 0xb78924ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#16 0xb67bb49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 3 (Thread 0xac7c6b90 (LWP 10007)):
#0  0xb8021430 in __kernel_vsyscall ()
#1  0xb78960e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb69b69b2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb5e16148 in ?? () from /usr/lib/libthreadweaver.so.4
#4  0xb5e18eec in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5e14d2b in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb5e18fea in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5e166d3 in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb5e16fbe in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb5e175fb in ThreadWeaver::Thread::run () from /usr/lib/libthreadweaver.so.4
#10 0xb69b596e in ?? () from /usr/lib/libQtCore.so.4
#11 0xb78924ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#12 0xb67bb49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xabfc5b90 (LWP 10008)):
#0  0xb8021430 in __kernel_vsyscall ()
#1  0xb78960e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb69b69b2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb5e16148 in ?? () from /usr/lib/libthreadweaver.so.4
#4  0xb5e18eec in ?? () from /usr/lib/libthreadweaver.so.4
#5  0xb5e14d2b in ?? () from /usr/lib/libthreadweaver.so.4
#6  0xb5e18fea in ?? () from /usr/lib/libthreadweaver.so.4
#7  0xb5e166d3 in ?? () from /usr/lib/libthreadweaver.so.4
#8  0xb5e16fbe in ?? () from /usr/lib/libthreadweaver.so.4
#9  0xb5e175fb in ThreadWeaver::Thread::run () from /usr/lib/libthreadweaver.so.4
#10 0xb69b596e in ?? () from /usr/lib/libQtCore.so.4
#11 0xb78924ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#12 0xb67bb49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb3f90710 (LWP 9995)):
[KCrash Handler]
#6  0xb4c65733 in QFormInternal::domPropertyToVariant () from /usr/lib/libamarokplasma.so.2
#7  0xb4c0a437 in QFormInternal::QAbstractFormBuilder::toVariant () from /usr/lib/libamarokplasma.so.2
#8  0xb4c23cfa in QFormInternal::QFormBuilder::applyProperties () from /usr/lib/libamarokplasma.so.2
#9  0xb4c00efd in QFormInternal::FormBuilderPrivate::applyProperties () from /usr/lib/libamarokplasma.so.2
#10 0xb4c0d9eb in QFormInternal::QAbstractFormBuilder::create () from /usr/lib/libamarokplasma.so.2
#11 0xb4c25248 in QFormInternal::QFormBuilder::create () from /usr/lib/libamarokplasma.so.2
#12 0xb4bff353 in QFormInternal::FormBuilderPrivate::create () from /usr/lib/libamarokplasma.so.2
#13 0xb4c0c704 in QFormInternal::QAbstractFormBuilder::create () from /usr/lib/libamarokplasma.so.2
#14 0xb4c23a8b in QFormInternal::QFormBuilder::create () from /usr/lib/libamarokplasma.so.2
#15 0xb4bff821 in QFormInternal::FormBuilderPrivate::create () from /usr/lib/libamarokplasma.so.2
#16 0xab688ff6 in QFormInternal::QAbstractFormBuilder::load () from /usr/lib/kde4/plugins/script/libqtscript_uitools.so
#17 0xab66f5fa in QUiLoader::load () from /usr/lib/kde4/plugins/script/libqtscript_uitools.so
#18 0xab66b56c in ?? () from /usr/lib/kde4/plugins/script/libqtscript_uitools.so
#19 0xb5c3108b in ?? () from /usr/lib/libQtScript.so.4
#20 0xb5bf8832 in ?? () from /usr/lib/libQtScript.so.4
#21 0xb5c2817b in ?? () from /usr/lib/libQtScript.so.4
#22 0xb5c1c22b in ?? () from /usr/lib/libQtScript.so.4
#23 0xb5c09617 in QScriptEngine::evaluate () from /usr/lib/libQtScript.so.4
#24 0xb7bb4c13 in ScriptManager::slotRunScript () from /usr/lib/libamaroklib.so.1
#25 0xb7bb5a60 in ScriptManager::slotConfigChanged () from /usr/lib/libamaroklib.so.1
#26 0xb7bb72d2 in ScriptManager::findScripts () from /usr/lib/libamaroklib.so.1
#27 0xb7bb77a3 in ScriptManager::qt_metacall () from /usr/lib/libamaroklib.so.1
#28 0xb6abfca8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#29 0xb6ac0932 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#30 0xb6ac50a7 in ?? () from /usr/lib/libQtCore.so.4
#31 0xb6ac51cc in ?? () from /usr/lib/libQtCore.so.4
#32 0xb6aba15f in QObject::event () from /usr/lib/libQtCore.so.4
#33 0xb6f7af2c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#34 0xb6f8322e in QApplication::notify () from /usr/lib/libQtGui.so.4
#35 0xb7e6e94d in KApplication::notify () from /usr/lib/libkdeui.so.5
#36 0xb6aa9a3b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#37 0xb6ad8d71 in ?? () from /usr/lib/libQtCore.so.4
#38 0xb6ad54e0 in ?? () from /usr/lib/libQtCore.so.4
#39 0xb44ceb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#40 0xb44d20eb in ?? () from /usr/lib/libglib-2.0.so.0
#41 0xb44d2268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#42 0xb6ad5438 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#43 0xb701c3f5 in ?? () from /usr/lib/libQtGui.so.4
#44 0xb6aa806a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#45 0xb6aa84aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#46 0xb6aaa959 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#47 0xb6f7ada7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#48 0x0814c4b2 in _start ()