Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.32-ARCH i686

What I was doing when the application crashed:
I was dragging folders with align to grid when sudenly plasma-desktop crashed.
I don't know how to reproduce it again

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb564d700 (LWP 2755))]

Thread 2 (Thread 0xa8b08b70 (LWP 2920)):
#0  0xb7833424 in __kernel_vsyscall ()
#1  0xb75d2e55 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7631067 in QWaitConditionPrivate::wait (this=0x915d5f8, mutex=0x915d5f4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#3  QWaitCondition::wait (this=0x915d5f8, mutex=0x915d5f4, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#4  0xb5de5f22 in QHostInfoAgent::run (this=0x915d5e8) at kernel/qhostinfo.cpp:260
#5  0xb7630052 in QThreadPrivate::start (arg=0x915d5e8) at thread/qthread_unix.cpp:188
#6  0xb75ce8ac in start_thread () from /lib/libpthread.so.0
#7  0xb606201e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb564d700 (LWP 2755)):
[KCrash Handler]
#6  0xa8dded17 in IconView::popupVisible() const () from /usr/lib/kde4/plasma_applet_folderview.so
#7  0xb6343d99 in QWidget::event (this=0x91b90b8, event=0xbfcdfc74) at kernel/qwidget.cpp:7748
#8  0xb62ef924 in QApplicationPrivate::notify_helper (this=0x8a88380, receiver=0x91b90b8, e=0xbfcdfc74) at kernel/qapplication.cpp:4065
#9  0xb62f774c in QApplication::notify (this=0x8a82430, receiver=0x91b90b8, e=0xbfcdfc74) at kernel/qapplication.cpp:4018
#10 0xb6d3260a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#11 0xb771e5bb in QCoreApplication::notifyInternal (this=0x8a82430, receiver=0x91b90b8, event=0xbfcdfc74) at kernel/qcoreapplication.cpp:610
#12 0xb6371c2a in QCoreApplication::sendEvent (this=0x8a8b920, w=0x91b90b8, xe=0xbfcdfcd0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#13 QX11Data::xdndHandleLeave (this=0x8a8b920, w=0x91b90b8, xe=0xbfcdfcd0) at kernel/qdnd_x11.cpp:1070
#14 0xb6371d91 in qt_xdnd_send_leave () at kernel/qdnd_x11.cpp:1107
#15 0xb6373bbf in QDragManager::move (this=0x8adad00, globalPos=...) at kernel/qdnd_x11.cpp:1586
#16 0xb6377c9f in QDragManager::eventFilter (this=0x8adad00, o=0x8d29428, e=0xbfce0384) at kernel/qdnd_x11.cpp:1297
#17 0xb771d82c in QCoreApplicationPrivate::sendThroughApplicationEventFilters (this=0x8a88380, receiver=0x8d29428, event=0xbfce0384) at kernel/qcoreapplication.cpp:707
#18 0xb62ef8a3 in QApplicationPrivate::notify_helper (this=0x8a88380, receiver=0x8d29428, e=0xbfce0384) at kernel/qapplication.cpp:4040
#19 0xb62f7950 in QApplication::notify (this=0x8a82430, receiver=0x8d29428, e=0xbfce0384) at kernel/qapplication.cpp:3767
#20 0xb6d3260a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#21 0xb771e5bb in QCoreApplication::notifyInternal (this=0x8a82430, receiver=0x8d29428, event=0xbfce0384) at kernel/qcoreapplication.cpp:610
#22 0xb62f6913 in QCoreApplication::sendSpontaneousEvent (receiver=0x8d29428, event=0xbfce0384, alienWidget=0x8f16118, nativeWidget=0x8fc3148, buttonDown=0xb6b5d500, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#23 QApplicationPrivate::sendMouseEvent (receiver=0x8d29428, event=0xbfce0384, alienWidget=0x8f16118, nativeWidget=0x8fc3148, buttonDown=0xb6b5d500, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#24 0xb6364404 in QETWidget::translateMouseEvent (this=0x8fc3148, event=0xbfce18e0) at kernel/qapplication_x11.cpp:4411
#25 0xb63638e5 in QApplication::x11ProcessEvent (this=0x8a82430, event=0xbfce18e0) at kernel/qapplication_x11.cpp:3430
#26 0xb638dfd2 in x11EventSourceDispatch (s=0x8a8afb0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#27 0xb5ef6378 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#28 0xb5ef9bf0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#29 0xb5ef9d23 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#30 0xb7748d25 in QEventDispatcherGlib::processEvents (this=0x8a87fb8, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#31 0xb638d705 in QGuiEventDispatcherGlib::processEvents (this=0x8a87fb8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#32 0xb771cba9 in QEventLoop::processEvents (this=0x8e86260, flags=) at kernel/qeventloop.cpp:149
#33 0xb771cffa in QEventLoop::exec (this=0x8e86260, flags=...) at kernel/qeventloop.cpp:201
#34 0xb637762c in QDragManager::drag (this=0x8adad00, o=0x8f9cbe0) at kernel/qdnd_x11.cpp:1970
#35 0xb6302d1e in QDrag::exec (this=0x8f9cbe0, supportedActions=..., defaultDropAction=Qt::IgnoreAction) at kernel/qdrag.cpp:282
#36 0xb6302dd4 in QDrag::exec (this=0x8f9cbe0, supportedActions=...) at kernel/qdrag.cpp:239
#37 0xa8de86a2 in IconView::startDrag(QPointF const&, QWidget*) () from /usr/lib/kde4/plasma_applet_folderview.so
#38 0xa8de89fa in IconView::mouseMoveEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/kde4/plasma_applet_folderview.so
#39 0xb68f0418 in QGraphicsItem::sceneEvent (this=0x8e660c8, event=0xbfce28b0) at graphicsview/qgraphicsitem.cpp:5026
#40 0xb693c95f in QGraphicsWidget::sceneEvent (this=0x8e660c0, event=0xbfce28b0) at graphicsview/qgraphicswidget.cpp:1112
#41 0xb6912124 in QGraphicsScenePrivate::sendEvent (this=0x8aed848, item=0x8e660c8, event=0xbfce28b0) at graphicsview/qgraphicsscene.cpp:1159
#42 0xb6913743 in QGraphicsScenePrivate::sendMouseEvent (this=0x8aed848, mouseEvent=0xbfce28b0) at graphicsview/qgraphicsscene.cpp:1230
#43 0xb691e58d in QGraphicsScene::mouseMoveEvent (this=0x8b72740, mouseEvent=0xbfce28b0) at graphicsview/qgraphicsscene.cpp:4419
#44 0xb69200a7 in QGraphicsScene::event (this=0x8b72740, event=0xbfce28b0) at graphicsview/qgraphicsscene.cpp:3802
#45 0xb62ef924 in QApplicationPrivate::notify_helper (this=0x8a88380, receiver=0x8b72740, e=0xbfce28b0) at kernel/qapplication.cpp:4065
#46 0xb62f700c in QApplication::notify (this=0x8a82430, receiver=0x8b72740, e=0xbfce28b0) at kernel/qapplication.cpp:3605
#47 0xb6d3260a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#48 0xb771e5bb in QCoreApplication::notifyInternal (this=0x8a82430, receiver=0x8b72740, event=0xbfce28b0) at kernel/qcoreapplication.cpp:610
#49 0xb692cf0f in QCoreApplication::sendEvent (this=0x8fc3a80, event=0xbfce3014) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#50 QGraphicsViewPrivate::mouseMoveEventHandler (this=0x8fc3a80, event=0xbfce3014) at graphicsview/qgraphicsview.cpp:605
#51 0xb6931e73 in QGraphicsView::mouseMoveEvent (this=0x8fc3148, event=0xbfce3014) at graphicsview/qgraphicsview.cpp:3321
#52 0xb6344023 in QWidget::event (this=0x8fc3148, event=0xbfce3014) at kernel/qwidget.cpp:7539
#53 0xb66ea253 in QFrame::event (this=0x8fc3148, e=0xbfce3014) at widgets/qframe.cpp:559
#54 0xb67879d4 in QAbstractScrollArea::viewportEvent (this=0xbfcdfc74, e=0x0) at widgets/qabstractscrollarea.cpp:962
#55 0xb693160f in QGraphicsView::viewportEvent (this=0x8fc3148, event=0xbfce3014) at graphicsview/qgraphicsview.cpp:2919
#56 0xb6789fc5 in QAbstractScrollAreaPrivate::viewportEvent (this=0x8f9b148, o=0x8f16118, e=0xbfce3014) at widgets/qabstractscrollarea_p.h:100
#57 QAbstractScrollAreaFilter::eventFilter (this=0x8f9b148, o=0x8f16118, e=0xbfce3014) at widgets/qabstractscrollarea_p.h:111
#58 0xb771d76a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x8a88380, receiver=0x8f16118, event=0xbfce3014) at kernel/qcoreapplication.cpp:726
#59 0xb62ef8fc in QApplicationPrivate::notify_helper (this=0x8a88380, receiver=0x8f16118, e=0xbfce3014) at kernel/qapplication.cpp:4061
#60 0xb62f7950 in QApplication::notify (this=0x8a82430, receiver=0x8f16118, e=0xbfce3014) at kernel/qapplication.cpp:3767
#61 0xb6d3260a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#62 0xb771e5bb in QCoreApplication::notifyInternal (this=0x8a82430, receiver=0x8f16118, event=0xbfce3014) at kernel/qcoreapplication.cpp:610
#63 0xb62f6913 in QCoreApplication::sendSpontaneousEvent (receiver=0x8f16118, event=0xbfce3014, alienWidget=0x8f16118, nativeWidget=0x8fc3148, buttonDown=0xb6b5d500, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#64 QApplicationPrivate::sendMouseEvent (receiver=0x8f16118, event=0xbfce3014, alienWidget=0x8f16118, nativeWidget=0x8fc3148, buttonDown=0xb6b5d500, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#65 0xb6364404 in QETWidget::translateMouseEvent (this=0x8fc3148, event=0xbfce4570) at kernel/qapplication_x11.cpp:4411
#66 0xb63638e5 in QApplication::x11ProcessEvent (this=0x8a82430, event=0xbfce4570) at kernel/qapplication_x11.cpp:3430
#67 0xb638dfd2 in x11EventSourceDispatch (s=0x8a8afb0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#68 0xb5ef6378 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#69 0xb5ef9bf0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#70 0xb5ef9d23 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#71 0xb7748d25 in QEventDispatcherGlib::processEvents (this=0x8a87fb8, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#72 0xb638d705 in QGuiEventDispatcherGlib::processEvents (this=0x8a87fb8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#73 0xb771cba9 in QEventLoop::processEvents (this=0xbfce4864, flags=) at kernel/qeventloop.cpp:149
#74 0xb771cffa in QEventLoop::exec (this=0xbfce4864, flags=...) at kernel/qeventloop.cpp:201
#75 0xb771f46f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#76 0xb62ef7a7 in QApplication::exec () at kernel/qapplication.cpp:3525
#77 0xb4107b7d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#78 0x0804de42 in _start ()

Reported using DrKonqi