Version:            (using KDE 4.3.1)
OS:                Linux
Installed from:    Ubuntu Packages

I was watching some movies on youtube using Shiretoko in fullscreen mode. I came out of fullscreen movie mode and closed Shiretoko. The screen went black and reappeared a few seconds later. A message box popped up saying that Plasma had crashed, with the following callstack:

Application: Plasma Workspace (plasma), signal SIGSEGV
0x00007f87ce640d21 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 3584)]

Thread 4 (Thread 0x7f87b3f94950 (LWP 3715)):
#0  0x00007f87cbcf82e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f87cf122939 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2  0x00007f87d28db4cc in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f87cf121952 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f87cbcf43ba in start_thread () from /lib/libpthread.so.0
#5  0x00007f87ce67efcd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f87b2b42950 (LWP 3733)):
#0  0x00007f87ce677742 in select () from /lib/libc.so.6
#1  0x00007f87cf1e8f06 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007f87cf121952 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007f87cbcf43ba in start_thread () from /lib/libpthread.so.0
#4  0x00007f87ce67efcd in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f87b2341950 (LWP 3763)):
#0  0x00007f87cbcf82e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f87cf122939 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2  0x00007f87b5b6fd4e in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#3  0x00007f87cf121952 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f87cbcf43ba in start_thread () from /lib/libpthread.so.0
#5  0x00007f87ce67efcd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f87d3c02760 (LWP 3584)):
[KCrash Handler]
#5  0x00007f87cff13294 in QGraphicsItem::isWidget () from /usr/lib/libQtGui.so.4
#6  0x00007f87cff15d49 in QGraphicsItem::isWindow () from /usr/lib/libQtGui.so.4
#7  0x00007f87cff480f1 in QGraphicsScene::event () from /usr/lib/libQtGui.so.4
#8  0x00007f87cf94f78d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#9  0x00007f87cf95797a in QApplication::notify () from /usr/lib/libQtGui.so.4
#10 0x00007f87d200984b in KApplication::notify () from /usr/lib/libkdeui.so.5
#11 0x00007f87cf20a75c in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#12 0x00007f87cff56de6 in QGraphicsView::viewportEvent () from /usr/lib/libQtGui.so.4
#13 0x00007f87cf209a68 in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#14 0x00007f87cf94f75c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#15 0x00007f87cf95797a in QApplication::notify () from /usr/lib/libQtGui.so.4
#16 0x00007f87d200984b in KApplication::notify () from /usr/lib/libkdeui.so.5
#17 0x00007f87cf20a75c in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#18 0x00007f87cf9a0a3a in QWidget::event () from /usr/lib/libQtGui.so.4
#19 0x00007f87cfd3a40b in QFrame::event () from /usr/lib/libQtGui.so.4
#20 0x00007f87cfdcb949 in QAbstractScrollArea::event () from /usr/lib/libQtGui.so.4
#21 0x00007f87cf94f78d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#22 0x00007f87cf95797a in QApplication::notify () from /usr/lib/libQtGui.so.4
#23 0x00007f87d200984b in KApplication::notify () from /usr/lib/libkdeui.so.5
#24 0x00007f87cf20a75c in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#25 0x00007f87cf956495 in QApplication::setActiveWindow () from /usr/lib/libQtGui.so.4
#26 0x00007f87cf9bfe2d in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#27 0x00007f87cf9e8464 in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007f87ca0c420a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0x00007f87ca0c78e0 in ?? () from /usr/lib/libglib-2.0.so.0
#30 0x00007f87ca0c7a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0x00007f87cf233e6f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#32 0x00007f87cf9e7bef in ?? () from /usr/lib/libQtGui.so.4
#33 0x00007f87cf209002 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#34 0x00007f87cf2093cd in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#35 0x00007f87cf20b694 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#36 0x00007f87d396a9bb in kdemain () from /usr/lib/libkdeinit4_plasma.so
#37 0x00007f87ce5b75a6 in __libc_start_main () from /lib/libc.so.6
#38 0x00000000004007c9 in _start ()

I cannot reproduce the crash.

Regards
Graham