Description of problem:

I has Mageia 2 distribution with KDE 4.8.5 and Amarok 2.6 built from sources. I've updated my system into Cauldron, with KDE 4.9.1 and installed amarok from repository. It now crashes on start. When starting it in debug mode, the last lines of output is:

amarok:               [MassStorageDeviceHandler] Found existing UUID config for ID  "21"  , uuid  "eb3c5540-d8fa-4a78-935d-cea61cba959a" 
unnamed app(3626): Communication problem with  "amarok" , it probably crashed. 
Error message was:  "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" " 

The crash can be reproduced every time. 

Version-Release number of selected component (if applicable):
2.6.0-1.mga3

How reproducible:
Update from Mageia 2 to Cauldron and run Amarok.

Backtrace:

Application: Amarok (amarok), signal: Segmentation fault
Using host libthread_db library "/lib/i686/libthread_db.so.1".
[Current thread is 1 (Thread 0xaf2c8740 (LWP 3784))]

Thread 4 (Thread 0xa9b46b40 (LWP 3788)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb564b86b in poll () from /lib/i686/libc.so.6
#2  0xb2ea8df6 in poll_func () from /lib/libpulse.so.0
#3  0xb2e970fa in pa_mainloop_poll () from /lib/libpulse.so.0
#4  0xb2e97929 in pa_mainloop_iterate () from /lib/libpulse.so.0
#5  0xb2e97a04 in pa_mainloop_run () from /lib/libpulse.so.0
#6  0xb2ea8d7e in thread () from /lib/libpulse.so.0
#7  0xb00b316a in internal_thread_func () from /usr/lib/pulseaudio/libpulsecommon-2.1.so
#8  0xb51babb8 in start_thread () from /lib/i686/libpthread.so.0
#9  0xb565611e in clone () from /lib/i686/libc.so.6

Thread 3 (Thread 0x9a64fb40 (LWP 3789)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb51be623 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i686/libpthread.so.0
#2  0xb5664114 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/i686/libc.so.6
#3  0xa3e66ce3 in my_service_thread_sleep () from /lib/libmysqld.so.18
#4  0xa3e60fef in ma_checkpoint_background () from /lib/libmysqld.so.18
#5  0xb51babb8 in start_thread () from /lib/i686/libpthread.so.0
#6  0xb565611e in clone () from /lib/i686/libc.so.6

Thread 2 (Thread 0x99cffb40 (LWP 3790)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb564b86b in poll () from /lib/i686/libc.so.6
#2  0xb352973b in g_poll () from /lib/libglib-2.0.so.0
#3  0xb351ac90 in g_main_context_iterate.isra.22 () from /lib/libglib-2.0.so.0
#4  0xb351adf1 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#5  0xb59c209f in QEventDispatcherGlib::processEvents (this=0x99300468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0xb598ee1c in QEventLoop::processEvents (this=this@entry=0x99cff248, flags=...) at kernel/qeventloop.cpp:149
#7  0xb598f111 in QEventLoop::exec (this=0x99cff248, flags=...) at kernel/qeventloop.cpp:204
#8  0xb587c40c in QThread::exec (this=0xa5e6ad8) at thread/qthread.cpp:501
#9  0xb596d68d in QInotifyFileSystemWatcherEngine::run (this=0xa5e6ad8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb587f7d0 in QThreadPrivate::start (arg=0xa5e6ad8) at thread/qthread_unix.cpp:307
#11 0xb51babb8 in start_thread () from /lib/i686/libpthread.so.0
#12 0xb565611e in clone () from /lib/i686/libc.so.6

Thread 1 (Thread 0xaf2c8740 (LWP 3784)):
[KCrash Handler]
#7  0xb587cbd6 in QThreadData::~QThreadData (this=0x9f5d130, __in_chrg=<optimized out>) at thread/qthread.cpp:102
#8  0xb587cd40 in QThreadData::deref (this=0x9f5d130) at thread/qthread.cpp:128
#9  0xb59a56fe in QObjectPrivate::~QObjectPrivate (this=0xa8bf990, __in_chrg=<optimized out>) at kernel/qobject.cpp:174
#10 0xb59a58c2 in QObjectPrivate::~QObjectPrivate (this=0xa8bf990, __in_chrg=<optimized out>) at kernel/qobject.cpp:186
#11 0xb59a962a in cleanup (pointer=<optimized out>) at ../../src/corelib/tools/qscopedpointer.h:62
#12 ~QScopedPointer (this=0xa8c0190, __in_chrg=<optimized out>) at ../../src/corelib/tools/qscopedpointer.h:100
#13 QObject::~QObject (this=0xa8c018c, __in_chrg=<optimized out>) at kernel/qobject.cpp:817
#14 0xb59280e3 in ~QDeviceClosedNotifier (this=0xa8c018c, __in_chrg=<optimized out>) at io/qtextstream.cpp:318
#15 QTextStreamPrivate::~QTextStreamPrivate (this=0xa8c0188, __in_chrg=<optimized out>) at io/qtextstream.cpp:447
#16 0xb5931bfd in cleanup (pointer=<optimized out>) at ../../src/corelib/tools/qscopedpointer.h:62
#17 ~QScopedPointer (this=<optimized out>, __in_chrg=<optimized out>) at ../../src/corelib/tools/qscopedpointer.h:100
#18 QTextStream::~QTextStream (this=0xa8c1418, __in_chrg=<optimized out>) at io/qtextstream.cpp:1142
#19 0xa53052f4 in MassStorageDeviceHandlerFactory::createHandler(Solid::Device const&, QString const&, SqlStorage*) const () from /usr/lib/kde4/amarok_device_massstorage.so
#20 0xb6f818d9 in MountPointManager::createHandlerFromDevice(Solid::Device const&, QString const&) () from /lib/libamaroklib.so.1
#21 0xb6f84201 in MountPointManager::loadDevicePlugins(QList<Plugins::PluginFactory*> const&) () from /lib/libamaroklib.so.1
#22 0xb6f8a3f4 in Plugins::PluginManager::init() () from /lib/libamaroklib.so.1
#23 0xb6f8b121 in Plugins::PluginManager::PluginManager(QObject*) () from /lib/libamaroklib.so.1
#24 0xb6f8b306 in Plugins::PluginManager::instance() () from /lib/libamaroklib.so.1
#25 0xb6f6a0c7 in MainWindow::MainWindow() () from /lib/libamaroklib.so.1
#26 0xb6f425c4 in App::continueInit() () from /lib/libamaroklib.so.1
#27 0xb6f43dc8 in App::App() () from /lib/libamaroklib.so.1
#28 0x0804fec0 in main ()