Application that crashed: okular
Version of the application: 0.9.5
KDE Version: 4.3.5 (KDE 4.3.5)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Okular crashed when tryin to open several pdf's from nautilus at the same time. Second try succeeded. 

 -- Backtrace:
Application: Okular (okular), signal: Segmentation fault
[Current thread is 1 (Thread 0xb774f700 (LWP 17787))]

Thread 4 (Thread 0xb10f3b70 (LWP 17807)):
#0  0x004ee422 in __kernel_vsyscall ()
#1  0x00ac0bd3 in ?? () from /lib/tls/i686/cmov/libc.so.6
#2  0x00a57f57 in ?? () from /lib/tls/i686/cmov/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 3 (Thread 0xafefeb70 (LWP 17809)):
[KCrash Handler]
#6  0x00a52123 in ?? () from /lib/tls/i686/cmov/libc.so.6
#7  0x00a544e2 in ?? () from /lib/tls/i686/cmov/libc.so.6
#8  0x00a56898 in malloc () from /lib/tls/i686/cmov/libc.so.6
#9  0x004aabb7 in operator new(unsigned int) () from /usr/lib/libstdc++.so.6
#10 0x03b55669 in GfxState::save() () from /usr/lib/libpoppler.so.5
#11 0x03b3417d in Gfx::saveState() () from /usr/lib/libpoppler.so.5
#12 0x03b341ad in Gfx::opSave(Object*, int) () from /usr/lib/libpoppler.so.5
#13 0x03b34606 in Gfx::execOp(Object*, Object*, int) () from /usr/lib/libpoppler.so.5
#14 0x03b34c29 in Gfx::go(int) () from /usr/lib/libpoppler.so.5
#15 0x03b37c89 in Gfx::display(Object*, int) () from /usr/lib/libpoppler.so.5
#16 0x03b829f0 in Page::displaySlice(OutputDev*, double, double, int, int, int, int, int, int, int, int, Catalog*, int (*)(void*), void*, int (*)(Annot*, void*), void*) ()
   from /usr/lib/libpoppler.so.5
#17 0x03b86527 in PDFDoc::displayPageSlice(OutputDev*, int, double, double, int, int, int, int, int, int, int, int, int (*)(void*), void*, int (*)(Annot*, void*), void*) ()
   from /usr/lib/libpoppler.so.5
#18 0x06bc9e74 in Poppler::Page::renderToImage(double, double, int, int, int, int, Poppler::Page::Rotation) const () from /usr/lib/libpoppler-qt4.so.3
#19 0x01421af7 in ?? () from /usr/lib/kde4/okularGenerator_poppler.so
#20 0x00ebde32 in ?? () from /usr/lib/libQtCore.so.4
#21 0x02b6580e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#22 0x00ab38de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xaf6fdb70 (LWP 17810)):
#0  0x004ee422 in __kernel_vsyscall ()
#1  0x00ac0bd3 in ?? () from /lib/tls/i686/cmov/libc.so.6
#2  0x00a57f57 in ?? () from /lib/tls/i686/cmov/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0xb774f700 (LWP 17787)):
#0  0x00ac0c40 in ?? () from /lib/tls/i686/cmov/libc.so.6
#1  0x00aa5ca8 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0x021a8d80 in ?? () from /usr/lib/libxcb.so.1
#3  0x021aa9d2 in xcb_wait_for_reply () from /usr/lib/libxcb.so.1
#4  0x04e3c506 in _XReply () from /usr/lib/libX11.so.6
#5  0x04e19519 in XGetImage () from /usr/lib/libX11.so.6
#6  0x0460676b in QX11PixmapData::toImage() const () from /usr/lib/libQtGui.so.4
#7  0x045f4b3b in QPixmap::toImage() const () from /usr/lib/libQtGui.so.4
#8  0x02c56b53 in ?? () from /usr/lib/kde4/okularpart.so
#9  0x02c574e4 in ?? () from /usr/lib/kde4/okularpart.so
#10 0x02c69737 in ?? () from /usr/lib/kde4/okularpart.so
#11 0x02c6a63f in ?? () from /usr/lib/kde4/okularpart.so
#12 0x0457add4 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x02c79a20 in ?? () from /usr/lib/kde4/okularpart.so
#14 0x04525f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#15 0x0452d5ca in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x006c225a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#17 0x00fae6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#18 0x04582e25 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#19 0x0458364d in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#20 0x04582a16 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#21 0x0458364d in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#22 0x04583569 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#23 0x04583569 in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#24 0x04582a16 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#25 0x0458364d in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#26 0x04582a16 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#27 0x0458364d in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#28 0x04582a16 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#29 0x0458364d in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#30 0x04582a16 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#31 0x0458364d in QWidgetPrivate::paintSiblingsRecursive(QPaintDevice*, QList<QObject*> const&, int, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) ()
   from /usr/lib/libQtGui.so.4
#32 0x04582a16 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib/libQtGui.so.4
#33 0x047112f8 in ?? () from /usr/lib/libQtGui.so.4
#34 0x04574116 in QWidgetPrivate::syncBackingStore() () from /usr/lib/libQtGui.so.4
#35 0x0457b215 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#36 0x04948297 in QMainWindow::event(QEvent*) () from /usr/lib/libQtGui.so.4
#37 0x007a8434 in KMainWindow::event(QEvent*) () from /usr/lib/libkdeui.so.5
#38 0x007ee9df in KXmlGuiWindow::event(QEvent*) () from /usr/lib/libkdeui.so.5
#39 0x04525f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#40 0x0452d5ca in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#41 0x006c225a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#42 0x00fae6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#43 0x00faf2b2 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#44 0x00faf47d in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#45 0x00fd93ff in ?? () from /usr/lib/libQtCore.so.4
#46 0x05ec8e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#47 0x05ecc730 in ?? () from /lib/libglib-2.0.so.0
#48 0x05ecc863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#49 0x00fd902c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#50 0x045c6be5 in ?? () from /usr/lib/libQtGui.so.4
#51 0x00facc79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#52 0x00fad0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#53 0x00faf53f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#54 0x04525dd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#55 0x0804ef99 in _start ()

Reported using DrKonqi