Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-19-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
It's when i close that plasmoids window. I can do whatever i want but at the time i close that window, i have this bug

 -- Backtrace:
Application: Espace de travail Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb77a4700 (LWP 1733))]

Thread 2 (Thread 0xab70db70 (LWP 1734)):
#0  0x00a91422 in __kernel_vsyscall ()
#1  0x006e7e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x009b687d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x0015fe67 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0x08147922 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x0015ee32 in ?? () from /usr/lib/libQtCore.so.4
#6  0x006e380e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0x009a98de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb77a4700 (LWP 1733)):
[KCrash Handler]
#6  0x017cc18a in QGraphicsItem::isWidget() const () from /usr/lib/libQtGui.so.4
#7  0x01805527 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#8  0x011c8f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#9  0x011d067c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x00ee8bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#11 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#12 0x018165e7 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x0166ea95 in ?? () from /usr/lib/libQtGui.so.4
#14 0x0024e83a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x011c8f2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x011d05ca in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x00ee8bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x0121dad5 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x015cd633 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x0166cfaa in QAbstractScrollArea::event(QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x01816406 in QGraphicsView::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x011c8f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x011d05ca in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x00ee8bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#26 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#27 0x011d3df6 in QApplication::setActiveWindow(QWidget*) () from /usr/lib/libQtGui.so.4
#28 0x0123d21f in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#29 0x0126a502 in ?? () from /usr/lib/libQtGui.so.4
#30 0x04315e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#31 0x04319730 in ?? () from /lib/libglib-2.0.so.0
#32 0x04319863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#33 0x0027a02c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x01269be5 in ?? () from /usr/lib/libQtGui.so.4
#35 0x0024dc79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x0024e0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x0025053f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#38 0x011c8dd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#39 0x090d180d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#40 0x0804dde1 in _start ()

Reported using DrKonqi