Version:            (using KDE 4.3.5)
Compiler:          I do not know. Using Open SUSE 11.2(i586) -   KDE  4.3.5 (release 0) 
OS:                Linux
Installed from:    openSUSE RPMs

Starting my laptop, (after install and erease some widgets), desktop show next bug-mesage:

 Application: Área de trabajo de Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb567f700 (LWP 2035))]

Thread 2 (Thread 0xa6f8eb70 (LWP 2283)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb7526d95 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7586750 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0xb5ccda04 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7585623 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb75226e5 in start_thread () from /lib/libpthread.so.0
#6  0xb7522600 in ?? () from /lib/libpthread.so.0

Thread 1 (Thread 0xb567f700 (LWP 2035)):
[KCrash Handler]
#6  0xb53c0e4a in Plasma::Applet::flushPendingConstraintsEvents() () from /usr/lib/libplasma.so.3
#7  0xb53e6d3d in Plasma::Corona::loadLayout(QString const&) () from /usr/lib/libplasma.so.3
#8  0xb53e7b34 in Plasma::Corona::initializeLayout(QString const&) () from /usr/lib/libplasma.so.3
#9  0xb4186d74 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#10 0xb41870b0 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#11 0xb4187309 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#12 0xb7692864 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#13 0xb7693585 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#14 0xb7697b25 in ?? () from /usr/lib/libQtCore.so.4
#15 0xb7697c5c in ?? () from /usr/lib/libQtCore.so.4
#16 0xb768c51b in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#17 0xb62188fc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#18 0xb622034e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#19 0xb6c57521 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#20 0xb767c32e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#21 0xb76ab356 in ?? () from /usr/lib/libQtCore.so.4
#22 0xb76a82f2 in ?? () from /usr/lib/libQtCore.so.4
#23 0xb5df34c2 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0xb5df6d98 in ?? () from /usr/lib/libglib-2.0.so.0
#25 0xb5df6ebe in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0xb76a8011 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#27 0xb62ba29a in ?? () from /usr/lib/libQtGui.so.4
#28 0xb767a98d in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#29 0xb767add9 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#30 0xb767d270 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#31 0xb6218774 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#32 0xb4169be9 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#33 0x0804e147 in _start ()