Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I got notification from amarok to install codecs and accidentaly tried to drag that notification and plasma crashed.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3756)]

Thread 2 (Thread 0x7f3fb45eb950 (LWP 3758)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f3fd2f41939 in QWaitCondition::wait (this=0x108efc0, mutex=0x108efb8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f3fd1dbd4cc in QHostInfoAgent::run (this=0x108efa0) at kernel/qhostinfo.cpp:260
#3  0x00007f3fd2f40952 in QThreadPrivate::start (arg=0x108efa0) at thread/qthread_unix.cpp:189
#4  0x00007f3fcedc13ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f3fcf9a5fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f3fd3518750 (LWP 3756)):
[KCrash Handler]
#5  0x00007f3fca9115e0 in Plasma::ExtenderItem::config (this=0x20c4e00) at /build/buildd/kde4libs-4.2.96/plasma/extenderitem.cpp:153
#6  0x00007f3fca913152 in Plasma::ExtenderItem::isGroup (this=<value optimized out>) at /build/buildd/kde4libs-4.2.96/plasma/extenderitem.cpp:328
#7  0x00007f3fca9098bc in Plasma::Extender::isEmpty (this=<value optimized out>) at /build/buildd/kde4libs-4.2.96/plasma/extender.cpp:717
#8  0x00007f3fca9209d0 in Plasma::PopupAppletPrivate::internalTogglePopup (this=0xc97fb0) at /build/buildd/kde4libs-4.2.96/plasma/popupapplet.cpp:527
#9  0x00007f3fca920fb0 in Plasma::PopupApplet::qt_metacall (this=0xb35090, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffdb53e140)
    at /build/buildd/kde4libs-4.2.96/obj-x86_64-linux-gnu/plasma/popupapplet.moc:85
#10 0x00007f3fb5934355 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x00007f3fd303f1f2 in QMetaObject::activate (sender=0x1087fd0, from_signal_index=<value optimized out>, to_signal_index=5, argv=0xe17900) at kernel/qobject.cpp:3069
#12 0x00007f3fd0b7dbe5 in QGraphicsItem::sceneEvent (this=0x1087fe0, event=0xd) at graphicsview/qgraphicsitem.cpp:4789
#13 0x00007f3fd0ba2ce6 in QGraphicsScenePrivate::sendMouseEvent (this=0x7e1030, mouseEvent=0x7fffdb53ea40) at graphicsview/qgraphicsscene.cpp:1221
#14 0x00007f3fd0bac0f8 in QGraphicsScenePrivate::mousePressEventHandler (this=0x7e1030, mouseEvent=0x7fffdb53ea40) at graphicsview/qgraphicsscene.cpp:1310
#15 0x00007f3fd0baab50 in QGraphicsScene::event (this=0x70d870, event=0x7fffdb53ea40) at graphicsview/qgraphicsscene.cpp:3658
#16 0x00007f3fd05b278d in QApplicationPrivate::notify_helper (this=0x6c8690, receiver=0x70d870, e=0x7fffdb53ea40) at kernel/qapplication.cpp:4084
#17 0x00007f3fd05ba97a in QApplication::notify (this=0x689820, receiver=0x70d870, e=0x7fffdb53ea40) at kernel/qapplication.cpp:4049
#18 0x00007f3fd16f563b in KApplication::notify (this=0x689820, receiver=0x70d870, event=0x7fffdb53ea40) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#19 0x00007f3fd302975c in QCoreApplication::notifyInternal (this=0x689820, receiver=0x70d870, event=0x7fffdb53ea40) at kernel/qcoreapplication.cpp:602
#20 0x00007f3fd0bb7e2d in QGraphicsView::mousePressEvent (this=0xded7f0, event=0x7fffdb53f2b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#21 0x00007f3fd0603aa6 in QWidget::event (this=0xded7f0, event=0x7fffdb53f2b0) at kernel/qwidget.cpp:7512
#22 0x00007f3fd099d40b in QFrame::event (this=0xded7f0, e=0x7fffdb53f2b0) at widgets/qframe.cpp:559
#23 0x00007f3fd0bb9d1b in QGraphicsView::viewportEvent (this=0xded7f0, event=0x7fffdb53f2b0) at graphicsview/qgraphicsview.cpp:2933
#24 0x00007f3fd3028a68 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0xdab2f0, event=0x7fffdb53f2b0) at kernel/qcoreapplication.cpp:718
#25 0x00007f3fd05b275c in QApplicationPrivate::notify_helper (this=0x6c8690, receiver=0xdab2f0, e=0x7fffdb53f2b0) at kernel/qapplication.cpp:4080
#26 0x00007f3fd05bb0da in QApplication::notify (this=<value optimized out>, receiver=0xdab2f0, e=0x7fffdb53f2b0) at kernel/qapplication.cpp:3786
#27 0x00007f3fd16f563b in KApplication::notify (this=0x689820, receiver=0xdab2f0, event=0x7fffdb53f2b0) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#28 0x00007f3fd302975c in QCoreApplication::notifyInternal (this=0x689820, receiver=0xdab2f0, event=0x7fffdb53f2b0) at kernel/qcoreapplication.cpp:602
#29 0x00007f3fd05ba328 in QApplicationPrivate::sendMouseEvent (receiver=0xdab2f0, event=0x7fffdb53f2b0, alienWidget=0xdab2f0, nativeWidget=0xded7f0, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7f3fd1016eb0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#30 0x00007f3fd0623e19 in QETWidget::translateMouseEvent (this=0xded7f0, event=<value optimized out>) at kernel/qapplication_x11.cpp:4425
#31 0x00007f3fd0622a88 in QApplication::x11ProcessEvent (this=0x689820, event=0x7fffdb53fdf0) at kernel/qapplication_x11.cpp:3543
#32 0x00007f3fd064b464 in x11EventSourceDispatch (s=0x6cbc00, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#33 0x00007f3fcf01020a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#34 0x00007f3fcf0138e0 in ?? () from /usr/lib/libglib-2.0.so.0
#35 0x00007f3fcf013a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#36 0x00007f3fd3052e6f in QEventDispatcherGlib::processEvents (this=0x6c81c0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#37 0x00007f3fd064abef in QGuiEventDispatcherGlib::processEvents (this=0x7fffdb53df40, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#38 0x00007f3fd3028002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -615251744}) at kernel/qeventloop.cpp:149
#39 0x00007f3fd30283cd in QEventLoop::exec (this=0x7fffdb540120, flags={i = -615251664}) at kernel/qeventloop.cpp:200
#40 0x00007f3fd302a694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#41 0x00007f3fc7bf26bb in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#42 0x0000000000407215 in launch (argc=1, _name=0x67c3a8 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x67c3c8 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3c9 "0") at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:676
#43 0x0000000000407a38 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1168
#44 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1361
#45 0x0000000000408b26 in main (argc=2, argv=0x7fffdb540fc8, envp=0x7fffdb540fe0) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1788

Reported using DrKonqi