Hi, as of april 24th, plasma desktop shell crashes at random days and times,

My system is fully updated, and is running KDE 4.10.5R1

this is the contents of plasma-desktop-20130803-124131.kcrash.txt:

Code:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f5e58329780 (LWP 1909))]

Thread 3 (Thread 0x7f5e37cf2700 (LWP 1912)):
#0  0x00007f5e56c04964 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f5e4b433307 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f5e4b740660 <QTWTF::pageheap_memory>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f5e4b433339 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=<optimized out>) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f5e56c00e0f in start_thread () from /lib64/libpthread.so.0
#4  0x00007f5e559777dd in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f5e2e2e9700 (LWP 1913)):
#0  0x00007f5e56c02e25 in pthread_mutex_lock () from /lib64/libpthread.so.0
#1  0x00007f5e528f8a71 in g_mutex_lock () from /usr/lib64/libglib-2.0.so.0
#2  0x00007f5e528bb343 in g_main_context_prepare () from /usr/lib64/libglib-2.0.so.0
#3  0x00007f5e528bb9cb in ?? () from /usr/lib64/libglib-2.0.so.0
#4  0x00007f5e528bbbc4 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#5  0x00007f5e56fc12e6 in QEventDispatcherGlib::processEvents (this=0x7f5e240008e0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f5e56f91adf in QEventLoop::processEvents (this=this@entry=0x7f5e2e2e8dd0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f5e56f91d68 in QEventLoop::exec (this=0x7f5e2e2e8dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f5e56e940f0 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f5e56f7229f in QInotifyFileSystemWatcherEngine::run (this=0x1f85800) at io/qfilesystemwatcher_inotify.cpp:256
#10 0x00007f5e56e970cc in QThreadPrivate::start (arg=0x1f85800) at thread/qthread_unix.cpp:338
#11 0x00007f5e56c00e0f in start_thread () from /lib64/libpthread.so.0
#12 0x00007f5e559777dd in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f5e58329780 (LWP 1909)):
[KCrash Handler]
#6  0x00007f5e56fa6f7e in QMetaObject::addGuard (ptr=0x7fff17c941d0) at kernel/qobject.cpp:400
#7  0x00007f5e4ac39bfe in QPointer (p=..., this=0x7fff17c941d0) at ../../src/corelib/kernel/qpointer.h:62
#8  takeAt (i=3, this=0x2685468) at ../../src/corelib/tools/qlist.h:486
#9  QDeclarativeRepeater::itemsRemoved (this=0x26851b0, index=3, count=<optimized out>) at graphicsitems/qdeclarativerepeater.cpp:407
#10 0x00007f5e56fa829f in QMetaObject::activate (sender=0x2643180, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff17c94350) at kernel/qobject.cpp:3548
#11 0x00007f5e4ad7eaef in QDeclarativeVisualModel::itemsRemoved (this=<optimized out>, _t1=3, _t2=1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:161
#12 0x00007f5e4ac50b2c in QDeclarativeVisualDataModel::_q_itemsRemoved (this=0x2643180, index=3, count=1) at graphicsitems/qdeclarativevisualitemmodel.cpp:1314
#13 0x00007f5e4ad7f121 in QDeclarativeVisualDataModel::qt_static_metacall (_o=0x7fff17c941d0, _c=QMetaObject::ResetProperty, _id=16722784, _a=0x1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:401
#14 0x00007f5e56fa829f in QMetaObject::activate (sender=0x2b3e260, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff17c94590) at kernel/qobject.cpp:3548
#15 0x00007f5e4ad7357f in QListModelInterface::itemsRemoved (this=<optimized out>, _t1=3, _t2=1) at .moc/release-shared/moc_qlistmodelinterface_p.cpp:114
#16 0x00007f5e4abbc5bf in QDeclarativeListModel::remove (this=0x2b3e260, index=3) at util/qdeclarativelistmodel.cpp:402
#17 0x00007f5e4ad7214b in QDeclarativeListModel::qt_static_metacall (_o=0x7fff17c941d0, _o@entry=0x2b3e260, _c=QMetaObject::ResetProperty, _c@entry=QMetaObject::InvokeMetaMethod, _id=16722784, _id@entry=2, _a=0x1, _a@entry=0x7fff17c94820) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:76
#18 0x00007f5e4ad7224f in QDeclarativeListModel::qt_metacall (this=0x2b3e260, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0x7fff17c94820) at .moc/release-shared/moc_qdeclarativelistmodel_p.cpp:123
#19 0x00007f5e4ad1cd08 in QDeclarativeObjectMethodScriptClass::callMethod (this=this@entry=0x2724090, object=object@entry=0x2b3e260, index=10, returnType=<optimized out>, argCount=<optimized out>, argTypes=0x7fff17c94ae0, ctxt=ctxt@entry=0x7f5e2cfc92a8) at qml/qdeclarativeobjectscriptclass.cpp:970
#20 0x00007f5e4ad1e976 in QDeclarativeObjectMethodScriptClass::callPrecise (this=0x2724090, object=0x2b3e260, data=..., ctxt=0x7f5e2cfc92a8) at qml/qdeclarativeobjectscriptclass.cpp:944
#21 0x00007f5e4ad1f2ab in QDeclarativeObjectMethodScriptClass::call (this=<optimized out>, o=<optimized out>, ctxt=<optimized out>) at qml/qdeclarativeobjectscriptclass.cpp:917
#22 0x00007f5e4b4a9593 in QScript::DeclarativeObjectDelegate::call (exec=<optimized out>, callee=0x7f5e1dcec380, thisValue=..., args=...) at bridge/qscriptdeclarativeobject.cpp:154
#23 0x00007f5e4b3a5d70 in QTJSC::NativeFuncWrapper::operator() (this=0x7fff17c94c30, exec=0x7f5e2cfc92a8, jsobj=0x7f5e1dcec380, thisValue=..., argList=...) at ../3rdparty/javascriptcore/JavaScriptCore/runtime/CallData.cpp:46
#24 0x00007f5e4b382fca in QTJSC::cti_op_call_NotJSFunction (args=0x7fff17c94c80) at ../3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp:1780
#25 0x00007f5e1cc9d338 in ?? ()
#26 0x0000000000000000 in ?? ()
why does it segfault?