Application: plasma-desktop (0.3)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.33-ARCH i686
Distribution (Platform): Archlinux Packages

-- Information about the crash:
I was in trouble with nVidia videocard TwinView utility. I watched a movie connected on my TV using my laptop perfectly. It returned with plasma widgets a little misconfigured (size and position) after I unplugged the TV cable from my laptop. So I intended to close Folder View widget to reopen it later with default config. On close the whole Plasma Workspace crashed.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  0xb51b38b7 in Plasma::Corona::removeOffscreenWidget(QGraphicsWidget*) () from /usr/lib/libplasma.so.3
#7  0xb224403f in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#8  0xb6d09d45 in qDeleteInEventHandler (o=0x0) at kernel/qobject.cpp:3998
#9  0xb6d0b418 in QObject::event (this=0xa467980, e=0x0) at kernel/qobject.cpp:1231
#10 0xb629d706 in QWidget::event (this=0xa467980, event=0xa536b40) at kernel/qwidget.cpp:8455
#11 0xb623feec in QApplicationPrivate::notify_helper (this=0x99df408, receiver=0xa467980, e=0xa536b40) at kernel/qapplication.cpp:4304
#12 0xb6246ad9 in QApplication::notify (this=0x99d9250, receiver=0xa467980, e=0xa536b40) at kernel/qapplication.cpp:4269
#13 0xb6fed2ca in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#14 0xb6cfac0b in QCoreApplication::notifyInternal (this=0x99d9250, receiver=0xa467980, event=0xa536b40) at kernel/qcoreapplication.cpp:704
#15 0xb6cfd5e3 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x995b858) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#16 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x995b858) at kernel/qcoreapplication.cpp:1345
#17 0xb6cfd74d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1238
#18 0xb6d26a0f in QCoreApplication::sendPostedEvents (s=0x99e1510) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#19 postEventSourceDispatch (s=0x99e1510) at kernel/qeventdispatcher_glib.cpp:276
#20 0xb5a19895 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0xb5a1d568 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#22 0xb5a1d748 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#23 0xb6d26505 in QEventDispatcherGlib::processEvents (this=0x99df130, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#24 0xb62fcab5 in QGuiEventDispatcherGlib::processEvents (this=0x99df130, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#25 0xb6cf9249 in QEventLoop::processEvents (this=0xbfa88424, flags=) at kernel/qeventloop.cpp:149
#26 0xb6cf969a in QEventLoop::exec (this=0xbfa88424, flags=...) at kernel/qeventloop.cpp:201
#27 0xb6cfd80f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#28 0xb623ff87 in QApplication::exec () at kernel/qapplication.cpp:3583
#29 0xb2254a3e in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#30 0x0804e119 in _start ()

Reported using DrKonqi