Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.27.38-170.2.113.fc10.i686 i686
Distribution: "Fedora release 10 (Cambridge)"

What I was doing when the application crashed:
Every time I boot and log into KDE the plasma-desktop crashes.  Sometimes the system kicks me back to the log in screen and sometimes it loads the reporting assistant.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb784f9a0 (LWP 24355))]

Thread 2 (Thread 0xac412b90 (LWP 24356)):
#0  0x00455416 in __kernel_vsyscall ()
#1  0x003e1105 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x079f0cd2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0x07c5bcc2 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0x079efc92 in ?? () from /usr/lib/libQtCore.so.4
#5  0x003dd51f in start_thread () from /lib/libpthread.so.0
#6  0x0065a04e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb784f9a0 (LWP 24355)):
[KCrash Handler]
#6  0x0385617d in Plasma::Applet::flushPendingConstraintsEvents () from /usr/lib/libplasma.so.3
#7  0x03879eaf in Plasma::Corona::loadLayout () from /usr/lib/libplasma.so.3
#8  0x0387b8f1 in Plasma::Corona::initializeLayout () from /usr/lib/libplasma.so.3
#9  0x079527e7 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#10 0x0795296a in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#11 0x07956f20 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#12 0x07af9758 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#13 0x07afa3e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0x07aff517 in ?? () from /usr/lib/libQtCore.so.4
#15 0x07aff63c in ?? () from /usr/lib/libQtCore.so.4
#16 0x07af470f in QObject::event () from /usr/lib/libQtCore.so.4
#17 0x021289ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#18 0x02130cfe in QApplication::notify () from /usr/lib/libQtGui.so.4
#19 0x02b8850d in KApplication::notify () from /usr/lib/libkdeui.so.5
#20 0x07ae401b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#21 0x07b13351 in ?? () from /usr/lib/libQtCore.so.4
#22 0x07b0f950 in ?? () from /usr/lib/libQtCore.so.4
#23 0x00975258 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#24 0x00978903 in ?? () from /lib/libglib-2.0.so.0
#25 0x00978ac1 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#26 0x07b0f8a8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#27 0x021c8cf5 in ?? () from /usr/lib/libQtGui.so.4
#28 0x07ae264a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#29 0x07ae2a92 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#30 0x07ae4f39 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#31 0x02128867 in QApplication::exec () from /usr/lib/libQtGui.so.4
#32 0x0793ade0 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#33 0x08048702 in _start ()

Reported using DrKonqi