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 2.6.31-14-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
One was being downloaded and displayed in Konqueror in the notifications area attached to the main bar KDE 4.3.2 (for the visual effects of the work area were active). Click on the notification area of the download to drag out of the main bar and position on the desktop. Soon after, he tried to return to again be seated in the main bar and gave an unexpected error has arisen where a black screen and quickly returned to work normally. (sorry for the bad english)

 -- Backtrace:
Application: Espaço de trabalho do Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78c2700 (LWP 2947))]

Thread 2 (Thread 0xac56eb70 (LWP 2948)):
#0  0x0056e422 in __kernel_vsyscall ()
#1  0x0026de15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x007c578d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x008b2e67 in QWaitConditionPrivate::wait (this=0x8a2d4c0, mutex=0x8a2d4bc, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x8a2d4c0, mutex=0x8a2d4bc, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x00e4a922 in QHostInfoAgent::run (this=0x8a2d4b0) at kernel/qhostinfo.cpp:260
#6  0x008b1e32 in QThreadPrivate::start (arg=0x8a2d4b0) at thread/qthread_unix.cpp:188
#7  0x0026980e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x007b87ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb78c2700 (LWP 2947)):
[KCrash Handler]
#6  0x02938786 in Plasma::ExtenderPrivate::updateBorders (this=0x8822bb0) at ../../plasma/extender.cpp:671
#7  0x02937a9f in Plasma::ExtenderPrivate::removeExtenderItem (this=0x8822bb0, item=0x8f00810) at ../../plasma/extender.cpp:562
#8  0x029413af in Plasma::ExtenderItem::destroy (this=0x8f00810) at ../../plasma/extenderitem.cpp:445
#9  0x029433db in Plasma::ExtenderItem::qt_metacall (this=0x8f00810, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfdaf3bc) at ./extenderitem.moc:93
#10 0x009b8263 in QMetaObject::activate (sender=0x92e0f08, from_signal_index=6, to_signal_index=6, argv=0x0) at kernel/qobject.cpp:3113
#11 0x009b8ec2 in QMetaObject::activate (sender=0x92e0f08, m=0x2a68f30, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3187
#12 0x0299ef57 in Plasma::IconWidget::clicked (this=0x92e0f08) at ./iconwidget.moc:183
#13 0x029a1b30 in Plasma::IconWidget::mouseReleaseEvent (this=0x92e0f08, event=0xbfdafb3c) at ../../plasma/widgets/iconwidget.cpp:1173
#14 0x042a88bc in QGraphicsItem::sceneEvent (this=0x92e0f10, event=0xbfdafb3c) at graphicsview/qgraphicsitem.cpp:5030
#15 0x042f59ef in QGraphicsWidget::sceneEvent (this=0x92e0f08, event=0xbfdafb3c) at graphicsview/qgraphicswidget.cpp:1110
#16 0x042cae14 in QGraphicsScenePrivate::sendEvent (this=0x84d8180, item=0x92e0f10, event=0xbfdafb3c) at graphicsview/qgraphicsscene.cpp:1159
#17 0x042cc443 in QGraphicsScenePrivate::sendMouseEvent (this=0x84d8180, mouseEvent=0xbfdafb3c) at graphicsview/qgraphicsscene.cpp:1230
#18 0x042d7344 in QGraphicsScene::mouseReleaseEvent (this=0x851fd80, mouseEvent=0xbfdafb3c) at graphicsview/qgraphicsscene.cpp:4445
#19 0x042d8f87 in QGraphicsScene::event (this=0x851fd80, event=0xbfdafb3c) at graphicsview/qgraphicsscene.cpp:3808
#20 0x03c9cf54 in QApplicationPrivate::notify_helper (this=0x847f620, receiver=0x851fd80, e=0xbfdafb3c) at kernel/qapplication.cpp:4056
#21 0x03ca467c in QApplication::notify (this=0x844c3e0, receiver=0x851fd80, e=0xbfdafb3c) at kernel/qapplication.cpp:3603
#22 0x01102bfa in KApplication::notify (this=0x844c3e0, receiver=0x851fd80, event=0xbfdafb3c) at ../../kdeui/kernel/kapplication.cpp:302
#23 0x009a26cb in QCoreApplication::notifyInternal (this=0x844c3e0, receiver=0x851fd80, event=0xbfdafb3c) at kernel/qcoreapplication.cpp:610
#24 0x042eab1e in QCoreApplication::sendEvent (this=0x8a37cc0, event=0xbfdb0160) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#25 QGraphicsView::mouseReleaseEvent (this=0x8a37cc0, event=0xbfdb0160) at graphicsview/qgraphicsview.cpp:3382
#26 0x03cf2012 in QWidget::event (this=0x8a37cc0, event=0xbfdb0160) at kernel/qwidget.cpp:7549
#27 0x040a1633 in QFrame::event (this=0x8a37cc0, e=0xbfdb0160) at widgets/qframe.cpp:559
#28 0x04140494 in QAbstractScrollArea::viewportEvent (this=0x6, e=0x6c) at widgets/qabstractscrollarea.cpp:962
#29 0x042ea51f in QGraphicsView::viewportEvent (this=0x8a37cc0, event=0xbfdb0160) at graphicsview/qgraphicsview.cpp:2919
#30 0x04142a95 in QAbstractScrollAreaPrivate::viewportEvent (this=0x8adee10, o=0x8a50788, e=0xbfdb0160) at widgets/qabstractscrollarea_p.h:100
#31 QAbstractScrollAreaFilter::eventFilter (this=0x8adee10, o=0x8a50788, e=0xbfdb0160) at widgets/qabstractscrollarea_p.h:111
#32 0x009a183a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x847f620, receiver=0x8a50788, event=0xbfdb0160) at kernel/qcoreapplication.cpp:726
#33 0x03c9cf2c in QApplicationPrivate::notify_helper (this=0x847f620, receiver=0x8a50788, e=0xbfdb0160) at kernel/qapplication.cpp:4052
#34 0x03ca5033 in QApplication::notify (this=0x844c3e0, receiver=0x8a50788, e=0xbfdb0160) at kernel/qapplication.cpp:3758
#35 0x01102bfa in KApplication::notify (this=0x844c3e0, receiver=0x8a50788, event=0xbfdb0160) at ../../kdeui/kernel/kapplication.cpp:302
#36 0x009a26cb in QCoreApplication::notifyInternal (this=0x844c3e0, receiver=0x8a50788, event=0xbfdb0160) at kernel/qcoreapplication.cpp:610
#37 0x03ca3f6e in QCoreApplication::sendSpontaneousEvent (receiver=0x8a50788, event=0xbfdb0160, alienWidget=0x8a50788, nativeWidget=0x881b328, buttonDown=0x4517aa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#38 QApplicationPrivate::sendMouseEvent (receiver=0x8a50788, event=0xbfdb0160, alienWidget=0x8a50788, nativeWidget=0x881b328, buttonDown=0x4517aa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#39 0x03d127c0 in QETWidget::translateMouseEvent (this=0x881b328, event=0xbfdb17ac) at kernel/qapplication_x11.cpp:4409
#40 0x03d11c4b in QApplication::x11ProcessEvent (this=0x844c3e0, event=0xbfdb17ac) at kernel/qapplication_x11.cpp:3428
#41 0x03d3e502 in x11EventSourceDispatch (s=0x84824a8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#42 0x00d52e78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#43 0x00d56720 in ?? () from /lib/libglib-2.0.so.0
#44 0x00d56853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#45 0x009cd02c in QEventDispatcherGlib::processEvents (this=0x847f338, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#46 0x03d3dbe5 in QGuiEventDispatcherGlib::processEvents (this=0x847f338, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#47 0x009a0c79 in QEventLoop::processEvents (this=0xbfdb1aa4, flags=) at kernel/qeventloop.cpp:149
#48 0x009a10ca in QEventLoop::exec (this=0xbfdb1aa4, flags=...) at kernel/qeventloop.cpp:201
#49 0x009a353f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#50 0x03c9cdd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#51 0x0143180d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#52 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x8432f38 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#53 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#54 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#55 0x0804fbaf in main (argc=2, argv=0xbfdb2304, envp=0xbfdb2310) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi