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 2.6.28-15-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
* SUMMARY
In the Folder View widget, a mouse hover over a folder shows a popup with a preview of the folder's contents. Ocassionally, it is possible to induce one of these popups to stick around long enough to have two folder preview popups on screen at one time. Moving the first folder  into the second folder, while both popups are on screen, causes Plasma to crash and restart.

* STEPS TO REPRODUCE
1. Induce two folder preview popups to appear on screen at the same time. So we now have folders A and B, and popups A and B, respectively.
NOTE: I'm not sure what the trigger is that keeps popup A on screen for an extended period of time, but it does occassionally happen.
2. Drag folder A into popup B.

* RESULTS
Plasma displays an error message in popup A. The desktop beomes unresponsive. After a few seconds, Plasma crashes and restarts.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3480)]

Thread 2 (Thread 0xa94eab90 (LWP 3486)):
#0  0xb807f430 in __kernel_vsyscall ()
#1  0xb65950e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb67752ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7e7c172 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb77b8ac2 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0xb7e7b132 in ?? () from /usr/lib/libQtCore.so.4
#6  0xb65914ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb676649e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb609ea10 (LWP 3480)):
[KCrash Handler]
#6  0xb705dda8 in QGraphicsScene::drawItems () from /usr/lib/libQtGui.so.4
#7  0xb707361c in QGraphicsView::drawItems () from /usr/lib/libQtGui.so.4
#8  0xb7080022 in QGraphicsView::paintEvent () from /usr/lib/libQtGui.so.4
#9  0xb6a8274e in QWidget::event () from /usr/lib/libQtGui.so.4
#10 0xb6e33a53 in QFrame::event () from /usr/lib/libQtGui.so.4
#11 0xb6ed3c2f in QAbstractScrollArea::viewportEvent () from /usr/lib/libQtGui.so.4
#12 0xb707e9b2 in QGraphicsView::viewportEvent () from /usr/lib/libQtGui.so.4
#13 0xb6ed6235 in ?? () from /usr/lib/libQtGui.so.4
#14 0xb7f6edea in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#15 0xb6a2bd1a in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#16 0xb6a34122 in QApplication::notify () from /usr/lib/libQtGui.so.4
#17 0xb753c49d in KApplication::notify () from /usr/lib/libkdeui.so.5
#18 0xb7f6fbcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#19 0xb6a36e8e in QCoreApplication::sendSpontaneousEvent () from /usr/lib/libQtGui.so.4
#20 0xb6a8a4e9 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#21 0xb6a8ac8e in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#22 0xb6a8a0da in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#23 0xb6a8ac8e in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#24 0xb6a8a0da in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#25 0xb6c1b9ca in ?? () from /usr/lib/libQtGui.so.4
#26 0xb6a7aa06 in QWidgetPrivate::syncBackingStore () from /usr/lib/libQtGui.so.4
#27 0xb6a82bb5 in QWidget::event () from /usr/lib/libQtGui.so.4
#28 0xb6a2bd3c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#29 0xb6a34122 in QApplication::notify () from /usr/lib/libQtGui.so.4
#30 0xb753c49d in KApplication::notify () from /usr/lib/libkdeui.so.5
#31 0xb7f6fbcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#32 0xb7f70825 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#33 0xb7f70a1d in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#34 0xb7f9b6af in ?? () from /usr/lib/libQtCore.so.4
#35 0xb65deb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#36 0xb65e20eb in ?? () from /usr/lib/libglib-2.0.so.0
#37 0xb65e2268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#38 0xb7f9b2f8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#39 0xb6acda75 in ?? () from /usr/lib/libQtGui.so.4
#40 0xb7f6e1fa in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#41 0xb7f6e642 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#42 0xb7f70ae9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#43 0xb6a2bbb7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#44 0xb4bd52f0 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#45 0x0804e27d in _start ()

This bug may be a duplicate of or related to bug 211261

Reported using DrKonqi