Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-14-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
not load the desktop goes black and get the following error: Application that crashed: plasma-desktop

 -- Backtrace:
Application: Área de trabajo de Plasma (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  0x015ae6ee in Plasma::Applet::flushPendingConstraintsEvents (this=0x99071c0) at ../../plasma/applet.cpp:1109
#7  0x015d27dd in Plasma::Corona::loadLayout (this=0x9678710, configName=...) at ../../plasma/corona.cpp:379
#8  0x015d38be in Plasma::Corona::initializeLayout (this=0x9678710, configName=...) at ../../plasma/corona.cpp:324
#9  0x08ddc1d6 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#10 0x08ddc4da in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#11 0x08ddc733 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#12 0x00277263 in QMetaObject::activate (sender=0x9675800, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#13 0x00277ec2 in QMetaObject::activate (sender=0x9675800, m=0x351908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#14 0x0027c387 in QSingleShotTimer::timeout (this=0x9675800) at .moc/release-shared/qtimer.moc:76
#15 0x0027c49c in QSingleShotTimer::timerEvent (this=0x9675800) at kernel/qtimer.cpp:298
#16 0x002713bf in QObject::event (this=0x9675800, e=0xbfe4d7b0) at kernel/qobject.cpp:1075
#17 0x06764f54 in QApplicationPrivate::notify_helper (this=0x95f2500, receiver=0x9675800, e=0xbfe4d7b0) at kernel/qapplication.cpp:4056
#18 0x0676c67c in QApplication::notify (this=0x95ec530, receiver=0x9675800, e=0xbfe4d7b0) at kernel/qapplication.cpp:3603
#19 0x00eecbfa in KApplication::notify (this=0x95ec530, receiver=0x9675800, event=0xbfe4d7b0) at ../../kdeui/kernel/kapplication.cpp:302
#20 0x002616cb in QCoreApplication::notifyInternal (this=0x95ec530, receiver=0x9675800, event=0xbfe4d7b0) at kernel/qcoreapplication.cpp:610
#21 0x0028e7ce in QCoreApplication::sendEvent (this=0x95f4ca4) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#22 QTimerInfoList::activateTimers (this=0x95f4ca4) at kernel/qeventdispatcher_unix.cpp:572
#23 0x0028c0e0 in timerSourceDispatch (source=0x95f4c70) at kernel/qeventdispatcher_glib.cpp:165
#24 0x0050ee78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#25 0x00512720 in ?? () from /lib/libglib-2.0.so.0
#26 0x00512853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#27 0x0028c02c in QEventDispatcherGlib::processEvents (this=0x95f22f0, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#28 0x06805be5 in QGuiEventDispatcherGlib::processEvents (this=0x95f22f0, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#29 0x0025fc79 in QEventLoop::processEvents (this=0xbfe4da74, flags=) at kernel/qeventloop.cpp:149
#30 0x002600ca in QEventLoop::exec (this=0xbfe4da74, flags=...) at kernel/qeventloop.cpp:201
#31 0x0026253f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#32 0x06764dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#33 0x08dbf80d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#34 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x9598268 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#35 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#36 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#37 0x0804fbaf in main (argc=2, argv=0xbfe4e2d4, envp=0xbfe4e2e0) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi