Version:           4.1.96 (using Devel)
OS:                Linux
Installed from:    Compiled sources

I worked with 4.2RC1 (4.1.96) all day long, no crashes.

Working today means: Moving/Copying many files around, working with usb storage devices, using firefox.. nothing special.

Then I got this random crash where all panels disppeared. (They got restarted automatically)

Anwendung: Plasma-Arbeitsfläche (plasma), Signal SIGSEGV
[Current thread is 0 (LWP 28706)]

Thread 7 (Thread 0xa8cc7b90 (LWP 28712)):
#0  0xb7f84430 in __kernel_vsyscall ()
#1  0xb579c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb63ae9ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb65996f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb7919532 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0xb65986ae in ?? () from /usr/lib/libQtCore.so.4
#6  0xb579850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb63a07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 6 (Thread 0xa8493b90 (LWP 28713)):
#0  0xb7f84430 in __kernel_vsyscall ()
#1  0xb6398c01 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb6668150 in ?? () from /usr/lib/libQtCore.so.4
#3  0xb65986ae in ?? () from /usr/lib/libQtCore.so.4
#4  0xb579850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb63a07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 5 (Thread 0xa7c72b90 (LWP 28717)):
#0  0xb7f84430 in __kernel_vsyscall ()
#1  0xb579c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb63ae9ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb65996f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xa8fe6422 in RenderThread::run (this=0x9043364) at /build/buildd/kdebase-workspace-4.1.96/plasma/wallpapers/image/renderthread.cpp:91
#5  0xb65986ae in ?? () from /usr/lib/libQtCore.so.4
#6  0xb579850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb63a07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 4 (Thread 0xa652cb90 (LWP 29645)):
#0  0xb7f84430 in __kernel_vsyscall ()
#1  0xb579c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb63ae9ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb65996f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xa8fe6422 in RenderThread::run (this=0x9100894) at /build/buildd/kdebase-workspace-4.1.96/plasma/wallpapers/image/renderthread.cpp:91
#5  0xb65986ae in ?? () from /usr/lib/libQtCore.so.4
#6  0xb579850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb63a07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 3 (Thread 0xa5670b90 (LWP 29646)):
#0  0xb7f84430 in __kernel_vsyscall ()
#1  0xb579c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb63ae9ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb65996f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xa8fe6422 in RenderThread::run (this=0xa92dcdc) at /build/buildd/kdebase-workspace-4.1.96/plasma/wallpapers/image/renderthread.cpp:91
#5  0xb65986ae in ?? () from /usr/lib/libQtCore.so.4
#6  0xb579850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb63a07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xa4e6fb90 (LWP 29647)):
#0  0xb7f84430 in __kernel_vsyscall ()
#1  0xb579c075 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb63ae9ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb65996f2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb5a0a70b in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x99f8668, th=0x99cf110) at /build/buildd/kde4libs-4.1.96/threadweaver/Weaver/WeaverImpl.cpp:365
#5  0xb5a0e03c in ThreadWeaver::WorkingHardState::waitForAvailableJob (this=0x9acb6d0, th=0x99cf110) at /build/buildd/kde4libs-4.1.96/threadweaver/Weaver/WorkingHardState.cpp:80
#6  0xb5a08fab in ThreadWeaver::WeaverImpl::waitForAvailableJob (this=0x99f8668, th=0x99cf110) at /build/buildd/kde4libs-4.1.96/threadweaver/Weaver/WeaverImpl.cpp:356
#7  0xb5a0e17f in ThreadWeaver::WorkingHardState::applyForWork (this=0x9acb6d0, th=0x99cf110) at /build/buildd/kde4libs-4.1.96/threadweaver/Weaver/WorkingHardState.cpp:71
#8  0xb5a0b783 in ThreadWeaver::WeaverImpl::applyForWork (this=0x99f8668, th=0x99cf110, previous=0x993c158) at /build/buildd/kde4libs-4.1.96/threadweaver/Weaver/WeaverImpl.cpp:351
#9  0xb5a0c2bd in ThreadWeaver::ThreadRunHelper::run (this=0xa4e6f350, parent=0x99f8668, th=0x99cf110) at /build/buildd/kde4libs-4.1.96/threadweaver/Weaver/Thread.cpp:87
#10 0xb5a0c435 in ThreadWeaver::Thread::run (this=0x99cf110) at /build/buildd/kde4libs-4.1.96/threadweaver/Weaver/Thread.cpp:142
#11 0xb65986ae in ?? () from /usr/lib/libQtCore.so.4
#12 0xb579850f in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#13 0xb63a07ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb45af900 (LWP 28706)):
[KCrash Handler]
#6  0xb69c6661 in QImage::scanLine () from /usr/lib/libQtGui.so.4
#7  0xb69a3640 in QWidgetPrivate::setWindowIcon_sys () from /usr/lib/libQtGui.so.4
#8  0xb696e49b in QWidget::create () from /usr/lib/libQtGui.so.4
#9  0xb6973fee in QWidget::setVisible () from /usr/lib/libQtGui.so.4
#10 0xb6ee7346 in ?? () from /usr/lib/libQtGui.so.4
#11 0xb6ee7753 in QGraphicsProxyWidget::setWidget () from /usr/lib/libQtGui.so.4
#12 0xb7e2957b in Plasma::Label::Label () from /usr/lib/libplasma.so.3
#13 0xb7dca313 in ?? () from /usr/lib/libplasma.so.3
#14 0xb7dca4e9 in Plasma::Extender::itemRemovedEvent () from /usr/lib/libplasma.so.3
#15 0xb7dcb162 in ?? () from /usr/lib/libplasma.so.3
#16 0xb7dd0b08 in Plasma::ExtenderItem::destroy () from /usr/lib/libplasma.so.3
#17 0xb7dd30e3 in Plasma::ExtenderItem::qt_metacall () from /usr/lib/libplasma.so.3
#18 0xb669da60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#19 0xb669e7e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#20 0xb66d87a7 in QTimer::timeout () from /usr/lib/libQtCore.so.4
#21 0xb66a440e in QTimer::timerEvent () from /usr/lib/libQtCore.so.4
#22 0xb669853f in QObject::event () from /usr/lib/libQtCore.so.4
#23 0xb69188ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#24 0xb692072e in QApplication::notify () from /usr/lib/libQtGui.so.4
#25 0xb769904d in KApplication::notify (this=0x8dcfd40, receiver=0x4490b3e8, event=0xbfa861ac) at /build/buildd/kde4libs-4.1.96/kdeui/kernel/kapplication.cpp:307
#26 0xb6688e61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#27 0xb66b6d81 in ?? () from /usr/lib/libQtCore.so.4
#28 0xb66b3520 in ?? () from /usr/lib/libQtCore.so.4
#29 0xb55dd6f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#30 0xb55e0da3 in ?? () from /usr/lib/libglib-2.0.so.0
#31 0xb55e0f61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#32 0xb66b3497 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#33 0xb69b2ea5 in ?? () from /usr/lib/libQtGui.so.4
#34 0xb668752a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#35 0xb66876ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#36 0xb6689da5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#37 0xb6918767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#38 0xb7f07d86 in kdemain (argc=1, argv=0xbfa86584) at /build/buildd/kdebase-workspace-4.1.96/plasma/shells/desktop/main.cpp:54
#39 0x08048712 in main (argc=) at /build/buildd/kdebase-workspace-4.1.96/obj-i486-linux-gnu/plasma/shells/desktop/plasma_qgv_dummy.cpp:3