Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-15-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I clicked on link to *.pdf file, but only half the file loaded. When I clicked 'reload' konqueror crashed with segfault. 
UTL was: http://ccf.georgetown.edu/index/cms-filesystem-action?file=research/program+design/medicaid+re-enrollment+policies+and+childrens+risk+of+hospitalizations.pdf

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0x00000000 in ?? ()
#7  0x05c5c6ce in qDeleteAll<KIO::SchedulerPrivate::ProtocolInfoDict> () at /usr/include/qt4/QtCore/qalgorithms.h:358
#8  ~SchedulerPrivate () at ../../kio/kio/scheduler.cpp:103
#9  destroy () at ../../kio/kio/scheduler.cpp:209
#10 0x05b8ff6b in ~KCleanUpGlobalStatic (this=0x5d615d4, __in_chrg=<value optimized out>) at ../../kdecore/kernel/kglobal.h:62
#11 0x0072f05f in ?? () from /lib/tls/i686/cmov/libc.so.6
#12 0x0072f0cf in exit () from /lib/tls/i686/cmov/libc.so.6
#13 0x00716b5e in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#14 0x0804a5e1 in _start ()

Reported using DrKonqi