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 2.6.31-19-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Scrolling up in the side pane by grabbing the slider with the mouse. Instant close or kill happened as a result.

 -- Backtrace:
Application: Okular (okular), signal: Segmentation fault
[Current thread is 1 (Thread 0xb573b700 (LWP 3429))]

Thread 2 (Thread 0xb1ab0b70 (LWP 19978)):
[KCrash Handler]
#6  0xb59956a6 in FcConfigSubstituteWithPat () from /usr/lib/libfontconfig.so.1
#7  0xb5995d67 in FcConfigSubstitute () from /usr/lib/libfontconfig.so.1
#8  0xb1bcf306 in GlobalParams::getDisplayFont(GfxFont*) () from /usr/lib/libpoppler.so.5
#9  0xb1b5c792 in SplashOutputDev::doUpdateFont(GfxState*) () from /usr/lib/libpoppler.so.5
#10 0xb1b5caad in SplashOutputDev::drawChar(GfxState*, double, double, double, double, double, double, unsigned int, int, unsigned int*, int) () from /usr/lib/libpoppler.so.5
#11 0xb1ba6787 in Gfx::doShowText(GooString*) () from /usr/lib/libpoppler.so.5
#12 0xb1ba6aa6 in Gfx::opShowText(Object*, int) () from /usr/lib/libpoppler.so.5
#13 0xb1b9d606 in Gfx::execOp(Object*, Object*, int) () from /usr/lib/libpoppler.so.5
#14 0xb1b9dc29 in Gfx::go(int) () from /usr/lib/libpoppler.so.5
#15 0xb1ba0c89 in Gfx::display(Object*, int) () from /usr/lib/libpoppler.so.5
#16 0xb1beb9f0 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 0xb1bef527 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 0xb1cede74 in Poppler::Page::renderToImage(double, double, int, int, int, int, Poppler::Page::Rotation) const () from /usr/lib/libpoppler-qt4.so.3
#19 0xb1d4baf7 in ?? () from /usr/lib/kde4/okularGenerator_poppler.so
#20 0xb6c63e32 in ?? () from /usr/lib/libQtCore.so.4
#21 0xb5abf80e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#22 0xb610b8de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb573b700 (LWP 3429)):
#0  0xb7777422 in __kernel_vsyscall ()
#1  0xb60fdc96 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb5800d80 in ?? () from /usr/lib/libxcb.so.1
#3  0xb58029d2 in xcb_wait_for_reply () from /usr/lib/libxcb.so.1
#4  0xb5d01506 in _XReply () from /usr/lib/libX11.so.6
#5  0xb5cf6b71 in XTranslateCoordinates () from /usr/lib/libX11.so.6
#6  0xb6428266 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#7  0xb64282b4 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#8  0xb64282b4 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#9  0xb64282b4 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#10 0xb64282b4 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#11 0xb64282b4 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#12 0xb64282b4 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#13 0xb64282b4 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#14 0xb64282b4 in QWidget::mapFromGlobal(QPoint const&) const () from /usr/lib/libQtGui.so.4
#15 0xb6398273 in QApplicationPrivate::pickMouseReceiver(QWidget*, QPoint const&, QPoint&, QEvent::Type, QFlags<Qt::MouseButton>, QWidget*, QWidget*) () from /usr/lib/libQtGui.so.4
#16 0xb640d70a in ?? () from /usr/lib/libQtGui.so.4
#17 0xb640cc4b in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#18 0xb6439502 in ?? () from /usr/lib/libQtGui.so.4
#19 0xb5b0be88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#20 0xb5b0f730 in ?? () from /lib/libglib-2.0.so.0
#21 0xb5b0f863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#22 0xb6d7f02c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#23 0xb6438be5 in ?? () from /usr/lib/libQtGui.so.4
#24 0xb6d52c79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0xb6d530ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#26 0xb6d5553f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#27 0xb6397dd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#28 0x0804ef99 in _start ()

Reported using DrKonqi