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 2.6.31-17-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
While dragging a window button out of the taskbar on accident, plasma crashed. Java was running at the time

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f41ddb22750 (LWP 1903))]

Thread 2 (Thread 0x7f41ba4f6910 (LWP 1907)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f41dd5664fb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f41d999d78c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f41dd565445 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f41da2dba04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#5  0x00007f41daebb80d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f41ddb22750 (LWP 1903)):
[KCrash Handler]
#5  0x00007f41dcb45eb8 in _XReply () from /usr/lib/libX11.so.6
#6  0x00007f41dcb23447 in XGetWindowProperty () from /usr/lib/libX11.so.6
#7  0x00007f41db6770e3 in QDragManager::move(QPoint const&) () from /usr/lib/libQtGui.so.4
#8  0x00007f41db67ad59 in QDragManager::eventFilter(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#9  0x00007f41dd64b00b in QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#10 0x00007f41db5fbe76 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#11 0x00007f41db603011 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#12 0x00007f41dc232ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#13 0x00007f41dd64bc2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#14 0x00007f41db6028e0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#15 0x00007f41db668a0e in ?? () from /usr/lib/libQtGui.so.4
#16 0x00007f41db667aa9 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#17 0x00007f41db690d0c in ?? () from /usr/lib/libQtGui.so.4
#18 0x00007f41da52cbce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#19 0x00007f41da530598 in ?? () from /lib/libglib-2.0.so.0
#20 0x00007f41da5306c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#21 0x00007f41dd6741a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#22 0x00007f41db6904be in ?? () from /usr/lib/libQtGui.so.4
#23 0x00007f41dd64a532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#24 0x00007f41dd64a904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0x00007f41db67a67c in QDragManager::drag(QDrag*) () from /usr/lib/libQtGui.so.4
#26 0x00007f41db60e168 in QDrag::exec(QFlags<Qt::DropAction>, Qt::DropAction) () from /usr/lib/libQtGui.so.4
#27 0x00007f41db60e223 in QDrag::exec(QFlags<Qt::DropAction>) () from /usr/lib/libQtGui.so.4
#28 0x00007f41c13289a3 in ?? () from /usr/lib/kde4/plasma_applet_tasks.so
#29 0x00007f41dbb82111 in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#30 0x00007f41dbba7bc9 in ?? () from /usr/lib/libQtGui.so.4
#31 0x00007f41dbbb0221 in QGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libQtGui.so.4
#32 0x00007f41dbbb1cdf in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0x00007f41db5fbefc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#34 0x00007f41db6031ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#35 0x00007f41dc232ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#36 0x00007f41dd64bc2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#37 0x00007f41dbbbf9ed in QGraphicsViewPrivate::mouseMoveEventHandler(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#38 0x00007f41dbbc40fe in QGraphicsView::mouseMoveEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#39 0x00007f41db64a822 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#40 0x00007f41db9a62a6 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#41 0x00007f41dbbc392b in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#42 0x00007f41dd64af47 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#43 0x00007f41db5fbecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#44 0x00007f41db603011 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#45 0x00007f41dc232ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#46 0x00007f41dd64bc2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#47 0x00007f41db6028e0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#48 0x00007f41db668a0e in ?? () from /usr/lib/libQtGui.so.4
#49 0x00007f41db667aa9 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#50 0x00007f41db690d0c in ?? () from /usr/lib/libQtGui.so.4
#51 0x00007f41da52cbce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#52 0x00007f41da530598 in ?? () from /lib/libglib-2.0.so.0
#53 0x00007f41da5306c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#54 0x00007f41dd6741a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#55 0x00007f41db6904be in ?? () from /usr/lib/libQtGui.so.4
#56 0x00007f41dd64a532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#57 0x00007f41dd64a904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#58 0x00007f41dd64cab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#59 0x00007f41d26e24cf in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#60 0x0000000000406da8 in _start ()
The current source language is "auto; currently asm".
The current source language is "auto; currently c".

Reported using DrKonqi