Application: okular (0.13.3)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.2.0-030200-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
I was opening a pdf from hard disk and okular crashed.  I also had a pdf open in a google chrome browser window, so I don't know if that was associated with the crash.

-- Backtrace:
Application: Okular (okular), signal: Aborted
[KCrash Handler]
#6  0x00007fca650093a5 in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#7  0x00007fca6500cb0b in __GI_abort () at abort.c:92
#8  0x00007fca6596e43b in qt_message_output (msgType=<optimized out>, buf=0x238cbc8 "okular(29019): you need to call Settings::instance before using ") at global/qglobal.cpp:2315
#9  0x00007fca582e251c in Okular::Settings::self() () from /usr/lib/libokularcore.so.1
#10 0x00007fca582e4249 in Okular::Settings::sidebarShowText() () from /usr/lib/libokularcore.so.1
#11 0x00007fca585cd0fe in PresentationWidget::generateOverlay (this=0x2367b50) at ../ui/presentationwidget.cpp:969
#12 0x0000000000000000 in ?? ()

Reported using DrKonqi