plasma crashes on start up everytime installed somme debugs but some are missing, get this as a backtrace :

Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb788c720 (LWP 1547))]

Thread 2 (Thread 0xaecb9b70 (LWP 1549)):
#0 0x00dd8e36 in clock_gettime () from /lib/librt.so.1
#1 0x0413d50b in do_gettime () at tools/qelapsedtimer_unix.cpp:105
#2 qt_gettime () at tools/qelapsedtimer_unix.cpp:119
#3 0x042146e5 in QTimerInfoList::updateCurrentTime (this=0x9b2d73c) at kernel/qeventdispatcher_unix.cpp:339
#4 0x0421472a in QTimerInfoList::timerWait (this=0x9b2d73c, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5 0x042127a8 in timerSourcePrepareHelper (src=<value optimized out>, timeout=0xaecb90ac) at kernel/qeventdispatcher_glib.cpp:136
#6 0x0421283d in timerSourcePrepare (source=0x0, timeout=0xddcff4) at kernel/qeventdispatcher_glib.cpp:169
#7 0x02c2fe6a in g_main_context_prepare () from /lib/libglib-2.0.so.0
#8 0x02c30279 in ?? () from /lib/libglib-2.0.so.0
#9 0x02c30848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#10 0x0421259f in QEventDispatcherGlib::processEvents (this=0x9b2b2a8, flags=...) at kernel/qeventdispatcher_glib.cpp:417
#11 0x041e2609 in QEventLoop::processEvents (this=0xaecb9280, flags=) at kernel/qeventloop.cpp:149
#12 0x041e2a8a in QEventLoop::exec (this=0xaecb9280, flags=...) at kernel/qeventloop.cpp:201
#13 0x040deb7e in QThread::exec (this=0x9b2cb48) at thread/qthread.cpp:490
#14 0x041c135b in QInotifyFileSystemWatcherEngine::run (this=0x9b2cb48) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x040e1df9 in QThreadPrivate::start (arg=0x9b2cb48) at thread/qthread_unix.cpp:266
#16 0x00760cc9 in start_thread () from /lib/libpthread.so.0
#17 0x003956ae in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb788c720 (LWP 1547)):
[KCrash Handler]
#7 0x0873dc9c in Notifications::~Notifications (this=0xa18acf8, __in_chrg=<value optimized out>) at ../../../../../plasma/generic/applets/notifications/ui/notifications.cpp:115
#8 0x00514e21 in Plasma::ExtenderPrivate::loadExtenderItems (this=0xa18b728) at ../../plasma/extenders/extender.cpp:736
#9 0x00515ac2 in Plasma::Extender::Extender (this=0xa18aca8, applet=0x9a6e5e8) at ../../plasma/extenders/extender.cpp:105
#10 0x004bbe20 in Plasma::Applet::extender (this=0x9a6e5e8) at ../../plasma/applet.cpp:763
#11 0x00543cce in Plasma::ExtenderApplet::init (this=0x9a6e5e8) at ../../plasma/private/extenderapplet.cpp:51
#12 0x004dd76c in Plasma::ContainmentPrivate::initApplets (this=0x9a4c1b8) at ../../plasma/containment.cpp:462
#13 0x004f303f in Plasma::CoronaPrivate::importLayout (this=0x9613e90, conf=..., mergeConfig=false) at ../../plasma/corona.cpp:523
#14 0x004f3d5c in Plasma::Corona::loadLayout (this=0x9614708, configName=...) at ../../plasma/corona.cpp:458
#15 0x004f495e in Plasma::Corona::initializeLayout (this=0x9614708, configName=...) at ../../plasma/corona.cpp:361
#16 0x002ab972 in PlasmaApp::corona (this=0x9576720) at ../../../../plasma/desktop/shell/plasmaapp.cpp:800
#17 0x002abf5e in PlasmaApp::setupDesktop (this=0x9576720) at ../../../../plasma/desktop/shell/plasmaapp.cpp:286
#18 0x002af04c in PlasmaApp::qt_metacall (this=0x9576720, _c=QMetaObject::InvokeMetaMethod, _id=15, _a=0x960d788) at ./plasmaapp.moc:148
#19 0x041e98ca in QMetaObject::metacall (object=0x9576720, cl=QMetaObject::ReadProperty, idx=42, argv=0x960d788) at kernel/qmetaobject.cpp:237
#20 0x041f4df6 in QMetaCallEvent::placeMetaCall (this=0x960c1c0, object=0x9576720) at kernel/qobject.cpp:534
#21 0x041f66a2 in QObject::event (this=0x9576720, e=0x401fff18) at kernel/qobject.cpp:1219
#22 0x041e39db in QCoreApplication::event (this=0x9576720, e=0x960c1c0) at kernel/qcoreapplication.cpp:1561
#23 0x051f74d4 in QApplication::event (this=0x9576720, e=0x960c1c0) at kernel/qapplication.cpp:2439
#24 0x051f3fdc in QApplicationPrivate::notify_helper (this=0x95813e0, receiver=0x9576720, e=0x960c1c0) at kernel/qapplication.cpp:4396
#25 0x051fa04e in QApplication::notify (this=0x9576720, receiver=0x9576720, e=0x960c1c0) at kernel/qapplication.cpp:3798
#26 0x0112768a in KApplication::notify (this=0x9576720, receiver=0x9576720, event=0x960c1c0) at ../../kdeui/kernel/kapplication.cpp:310
#27 0x041e3b3b in QCoreApplication::notifyInternal (this=0x9576720, receiver=0x9576720, event=0x960c1c0) at kernel/qcoreapplication.cpp:732
#28 0x041e6d8b in sendEvent (receiver=0x0, event_type=0, data=0x9560028) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#29 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9560028) at kernel/qcoreapplication.cpp:1373
#30 0x041e6f4d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1266
#31 0x04212a74 in sendPostedEvents (s=0x9583710) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#32 postEventSourceDispatch (s=0x9583710) at kernel/qeventdispatcher_glib.cpp:277
#33 0x02c2c855 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#34 0x02c30668 in ?? () from /lib/libglib-2.0.so.0
#35 0x02c30848 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#36 0x04212565 in QEventDispatcherGlib::processEvents (this=0x955fce8, flags=...) at kernel/qeventdispatcher_glib.cpp:415
#37 0x052b5be5 in QGuiEventDispatcherGlib::processEvents (this=0x955fce8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x041e2609 in QEventLoop::processEvents (this=0xbfb8c0f4, flags=) at kernel/qeventloop.cpp:149
#39 0x041e2a8a in QEventLoop::exec (this=0xbfb8c0f4, flags=...) at kernel/qeventloop.cpp:201
#40 0x041e700f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#41 0x051f2e07 in QApplication::exec () at kernel/qapplication.cpp:3672
#42 0x0029086e in kdemain (argc=1, argv=0xbfb8c304) at ../../../../plasma/desktop/shell/main.cpp:118
#43 0x080485bb in main (argc=1, argv=0xbfb8c304) at plasma-desktop_dummy.cpp:3

does this mean anything to anyone? cos me its chinese !!

Chinese to me too

did it ever work?
version of kde?
Did you just do an upgrade? change something?
if you log in as a new user does it happen?

I suspect the configuration for the Notifications applet is corrupted. Please move your Plasma configuration elsewhere and try again.