Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-gentoo-r6 x86_64
Distribution: "Gentoo Base System release 1.12.11.1"

What I was doing when the application crashed:
The desktop crashed and automatically restarted when trying to click on the panel edition button.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 17258)]

Thread 3 (Thread 0x7f70e3a85910 (LWP 17431)):
#0  0x00007f7100152969 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f71003c67f3 in QWaitCondition::wait () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f70fc984e4c in ?? () from /usr/lib64/qt4/libQtNetwork.so.4
#3  0x00007f71003c5204 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f710014d8fc in start_thread () from /lib/libpthread.so.0
#5  0x00007f70fda9935d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f70e0b75910 (LWP 17436)):
#0  0x00007f7100152bed in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f71003c66f6 in QWaitCondition::wait () from /usr/lib64/qt4/libQtCore.so.4
#2  0x00007f71003bb3f6 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#3  0x00007f71003c5204 in ?? () from /usr/lib64/qt4/libQtCore.so.4
#4  0x00007f710014d8fc in start_thread () from /lib/libpthread.so.0
#5  0x00007f70fda9935d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7100988760 (LWP 17258)):
[KCrash Handler]
#5  0x00007f70fe7b42d4 in QGraphicsItem::isWidget () from /usr/lib64/qt4/libQtGui.so.4
#6  0x00007f70fe7b68c9 in QGraphicsItem::isWindow () from /usr/lib64/qt4/libQtGui.so.4
#7  0x00007f70fe7e8893 in QGraphicsScene::event () from /usr/lib64/qt4/libQtGui.so.4
#8  0x00007f70fe1dcfec in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#9  0x00007f70fe1de688 in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#10 0x00007f70fee25236 in KApplication::notify () from /usr/lib64/libkdeui.so.5
#11 0x00007f71004d14d3 in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#12 0x00007f70fe800406 in QGraphicsView::viewportEvent () from /usr/lib64/qt4/libQtGui.so.4
#13 0x00007f71004d0cb7 in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib64/qt4/libQtCore.so.4
#14 0x00007f70fe1dcfbc in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#15 0x00007f70fe1de688 in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#16 0x00007f70fee25236 in KApplication::notify () from /usr/lib64/libkdeui.so.5
#17 0x00007f71004d14d3 in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#18 0x00007f70fe23c4a8 in QWidget::event () from /usr/lib64/qt4/libQtGui.so.4
#19 0x00007f70fe5c5cf6 in QFrame::event () from /usr/lib64/qt4/libQtGui.so.4
#20 0x00007f70fe65b7e9 in QAbstractScrollArea::event () from /usr/lib64/qt4/libQtGui.so.4
#21 0x00007f70fe1dcfec in QApplicationPrivate::notify_helper () from /usr/lib64/qt4/libQtGui.so.4
#22 0x00007f70fe1de688 in QApplication::notify () from /usr/lib64/qt4/libQtGui.so.4
#23 0x00007f70fee25236 in KApplication::notify () from /usr/lib64/libkdeui.so.5
#24 0x00007f71004d14d3 in QCoreApplication::notifyInternal () from /usr/lib64/qt4/libQtCore.so.4
#25 0x00007f70fe1e8c48 in QApplication::setActiveWindow () from /usr/lib64/qt4/libQtGui.so.4
#26 0x00007f70fe250f7e in QApplication::x11ProcessEvent () from /usr/lib64/qt4/libQtGui.so.4
#27 0x00007f70fe27ad34 in ?? () from /usr/lib64/qt4/libQtGui.so.4
#28 0x00007f70fd0dad3e in ?? () from /usr/lib/libglib-2.0.so.0
#29 0x00007f70fd0dca85 in ?? () from /usr/lib/libglib-2.0.so.0
#30 0x00007f70fd0dcc5b in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0x00007f71004fce2f in QEventDispatcherGlib::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#32 0x00007f70fe27a51e in ?? () from /usr/lib64/qt4/libQtGui.so.4
#33 0x00007f71004d01a2 in QEventLoop::processEvents () from /usr/lib64/qt4/libQtCore.so.4
#34 0x00007f71004d0625 in QEventLoop::exec () from /usr/lib64/qt4/libQtCore.so.4
#35 0x00007f71004d4374 in QCoreApplication::exec () from /usr/lib64/qt4/libQtCore.so.4
#36 0x00007f70f4722fdf in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#37 0x0000000000407678 in _start ()

Reported using DrKonqi