Application that crashed: okular
Version of the application: 0.9.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-19-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Some time after I open this particular PDF (linked below), scrolling around will cause a segfault, both in okular and in the gnome document viewer.  I suspect that this may be really a ghostscript 
bug.

The PDF that shows the problem (eventually):
http://cseweb.ucsd.edu/classes/wi10/cse140/lectures/wk5.pdf

 -- Backtrace:
Application: Okular (okular), signal: Segmentation fault
[Current thread is 1 (Thread 0xb77d3700 (LWP 8957))]

Thread 2 (Thread 0xae5a3b70 (LWP 14112)):
[KCrash Handler]
#6  0x04d016a6 in FcConfigSubstituteWithPat () from /usr/lib/libfontconfig.so.1
#7  0x04d01d67 in FcConfigSubstitute () from /usr/lib/libfontconfig.so.1
#8  0x02f42306 in GlobalParams::getDisplayFont(GfxFont*) () from /usr/lib/libpoppler.so.5
#9  0x02ecf792 in SplashOutputDev::doUpdateFont(GfxState*) () from /usr/lib/libpoppler.so.5
#10 0x02ecfaad in SplashOutputDev::drawChar(GfxState*, double, double, double, double, double, double, unsigned int, int, unsigned int*, int) () from /usr/lib/libpoppler.so.5
#11 0x02f19787 in Gfx::doShowText(GooString*) () from /usr/lib/libpoppler.so.5
#12 0x02f19aa6 in Gfx::opShowText(Object*, int) () from /usr/lib/libpoppler.so.5
#13 0x02f10606 in Gfx::execOp(Object*, Object*, int) () from /usr/lib/libpoppler.so.5
#14 0x02f10c29 in Gfx::go(int) () from /usr/lib/libpoppler.so.5
#15 0x02f13c89 in Gfx::display(Object*, int) () from /usr/lib/libpoppler.so.5
#16 0x02f5e9f0 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 0x02f62527 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 0x02790e74 in Poppler::Page::renderToImage(double, double, int, int, int, int, Poppler::Page::Rotation) const () from /usr/lib/libpoppler-qt4.so.3
#19 0x05c4fb15 in ?? () from /usr/lib/kde4/okularGenerator_poppler.so
#20 0x00a81e32 in QThreadPrivate::start (arg=0x8c18830) at thread/qthread_unix.cpp:188
#21 0x077c480e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#22 0x033618de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb77d3700 (LWP 8957)):
#0  0x077c8111 in __pthread_mutex_unlock_usercnt () from /lib/tls/i686/cmov/libpthread.so.0
#1  0x0336ea86 in pthread_mutex_unlock () from /lib/tls/i686/cmov/libc.so.6
#2  0x0271dd61 in ?? () from /usr/lib/libxcb.so.1
#3  0x0271e2eb in ?? () from /usr/lib/libxcb.so.1
#4  0x0271e687 in xcb_writev () from /usr/lib/libxcb.so.1
#5  0x06d1d2e9 in _XSend () from /usr/lib/libX11.so.6
#6  0x06d1d949 in _XFlush () from /usr/lib/libX11.so.6
#7  0x00e50b70 in XRenderCompositeText32 () from /usr/lib/libXrender.so.1
#8  0x0123199b in QX11PaintEngine::drawFreetype (this=0x8c77ce8, p=..., ti=...) at painting/qpaintengine_x11.cpp:2435
#9  0x01197b41 in QPainter::drawTextItem (this=0xbf942bcc, p=..., _ti=...) at painting/qpainter.cpp:6164
#10 0x0129de01 in QTextLine::draw (this=0xbf941c48, p=0xbf942bcc, pos=..., selection=0x0) at text/qtextlayout.cpp:2137
#11 0x0129f295 in QTextLayout::draw (this=0x8a43eb4, p=0xbf942bcc, pos=..., selections=..., clip=...) at text/qtextlayout.cpp:1273
#12 0x01600981 in QItemDelegate::drawDisplay (this=0x8a455f8, painter=0xbf942bcc, option=..., rect=..., text=...) at itemviews/qitemdelegate.cpp:740
#13 0x02250074 in ?? () from /usr/lib/kde4/okularpart.so
#14 0x015ffbc1 in QItemDelegate::paint (this=0x8a455f8, painter=0xbf942bcc, option=..., index=...) at itemviews/qitemdelegate.cpp:479
#15 0x02250210 in ?? () from /usr/lib/kde4/okularpart.so
#16 0x015ea500 in QTreeView::drawRow (this=0x8a3a3d8, painter=0xbf942bcc, option=..., index=...) at itemviews/qtreeview.cpp:1640
#17 0x015f22cc in QTreeView::drawTree (this=0x8a3a3d8, painter=0xbf942bcc, region=...) at itemviews/qtreeview.cpp:1403
#18 0x015f2d4d in QTreeView::paintEvent (this=0x8a3a3d8, event=0xbf9433d4) at itemviews/qtreeview.cpp:1281
#19 0x010b3dd4 in QWidget::event (this=0x8a3a3d8, event=0xbf9433d4) at kernel/qwidget.cpp:7687
#20 0x01463633 in QFrame::event (this=0x8a3a3d8, e=0xbf9433d4) at widgets/qframe.cpp:559
#21 0x01502494 in QAbstractScrollArea::viewportEvent (this=0x1, e=0x88c21c4) at widgets/qabstractscrollarea.cpp:962
#22 0x015b6087 in QAbstractItemView::viewportEvent (this=0x8a3a3d8, event=0xbf9433d4) at itemviews/qabstractitemview.cpp:1476
#23 0x015f1434 in QTreeView::viewportEvent (this=0x8a3a3d8, event=0xbf9433d4) at itemviews/qtreeview.cpp:1266
#24 0x01504a95 in QAbstractScrollAreaPrivate::viewportEvent (this=0x8a3a868, o=0x8a4b658, e=0xbf9433d4) at widgets/qabstractscrollarea_p.h:100
#25 QAbstractScrollAreaFilter::eventFilter (this=0x8a3a868, o=0x8a4b658, e=0xbf9433d4) at widgets/qabstractscrollarea_p.h:111
#26 0x00b7183a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x88ba518, receiver=0x8a4b658, event=0xbf9433d4) at kernel/qcoreapplication.cpp:726
#27 0x0105ef2c in QApplicationPrivate::notify_helper (this=0x88ba518, receiver=0x8a4b658, e=0xbf9433d4) at kernel/qapplication.cpp:4052
#28 0x010665ca in QApplication::notify (this=0xbf944068, receiver=0x8a4b658, e=0xbf9433d4) at kernel/qapplication.cpp:4021
#29 0x00566bfa in KApplication::notify (this=0xbf944068, receiver=0x8a4b658, event=0xbf9433d4) at ../../kdeui/kernel/kapplication.cpp:302
#30 0x00b726cb in QCoreApplication::notifyInternal (this=0xbf944068, receiver=0x8a4b658, event=0xbf9433d4) at kernel/qcoreapplication.cpp:610
#31 0x010bbe25 in QCoreApplication::sendSpontaneousEvent (this=0x8a4d738, pdev=0x8a0855c, rgn=..., offset=..., flags=<value optimized out>, sharedPainter=0x0, backingStore=0x88e4528)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#32 QWidgetPrivate::drawWidget (this=0x8a4d738, pdev=0x8a0855c, rgn=..., offset=..., flags=<value optimized out>, sharedPainter=0x0, backingStore=0x88e4528) at kernel/qwidget.cpp:5079
#33 0x0124a233 in QWidgetBackingStore::sync (this=0x88e4528) at painting/qbackingstore.cpp:1261
#34 0x010ad116 in QWidgetPrivate::syncBackingStore (this=0x88e25e0) at kernel/qwidget.cpp:1603
#35 0x010b4215 in QWidget::event (this=0x89d4b08, event=0x95bcad8) at kernel/qwidget.cpp:7827
#36 0x01481297 in QMainWindow::event (this=0x89d4b08, event=0x95bcad8) at widgets/qmainwindow.cpp:1399
#37 0x0064cdc4 in KMainWindow::event (this=0x89d4b08, ev=0x95bcad8) at ../../kdeui/widgets/kmainwindow.cpp:1094
#38 0x0069330f in KXmlGuiWindow::event (this=0x89d4b08, ev=0x95bcad8) at ../../kdeui/xmlgui/kxmlguiwindow.cpp:131
#39 0x0105ef54 in QApplicationPrivate::notify_helper (this=0x88ba518, receiver=0x89d4b08, e=0x95bcad8) at kernel/qapplication.cpp:4056
#40 0x010665ca in QApplication::notify (this=0xbf944068, receiver=0x89d4b08, e=0x95bcad8) at kernel/qapplication.cpp:4021
#41 0x00566bfa in KApplication::notify (this=0xbf944068, receiver=0x89d4b08, event=0x95bcad8) at ../../kdeui/kernel/kapplication.cpp:302
#42 0x00b726cb in QCoreApplication::notifyInternal (this=0xbf944068, receiver=0x89d4b08, event=0x95bcad8) at kernel/qcoreapplication.cpp:610
#43 0x00b732b2 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x88a4e48) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#44 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x88a4e48) at kernel/qcoreapplication.cpp:1247
#45 0x00b7347d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#46 0x00b9d3ff in QCoreApplication::sendPostedEvents (s=0x88bc910) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#47 postEventSourceDispatch (s=0x88bc910) at kernel/qeventdispatcher_glib.cpp:210
#48 0x06576e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#49 0x0657a730 in ?? () from /lib/libglib-2.0.so.0
#50 0x0657a863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#51 0x00b9d02c in QEventDispatcherGlib::processEvents (this=0x88a4a30, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#52 0x010ffbe5 in QGuiEventDispatcherGlib::processEvents (this=0x88a4a30, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#53 0x00b70c79 in QEventLoop::processEvents (this=0xbf943f64, flags=) at kernel/qeventloop.cpp:149
#54 0x00b710ca in QEventLoop::exec (this=0xbf943f64, flags=...) at kernel/qeventloop.cpp:201
#55 0x00b7353f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#56 0x0105edd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#57 0x0804eec9 in _start ()

Reported using DrKonqi