Application that crashed: konqueror
Version of the application: 4.3.00 (KDE 4.3.0)
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.1
Operating System: Linux 2.6.30-gentoo-r4 x86_64

What I was doing when the application crashed:
I downloaded a torrent from http://torrent.fedoraproject.org/
When I closed the konqueror instance, konqueror crashed with the backtrace below. Seems like I am not able to reproduce this crash at will though.

 -- Backtrace:
Application: Konqueror (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#5  0x000000000060c5c0 in QListData::shared_null ()
#6  0x00007fca90fffd2e in qDeleteAll<QHash<QString, KIO::SchedulerPrivate::ProtocolInfo*>::const_iterator> (begin=<value optimized out>, end={i = 0x2ab5280})
    at /usr/include/qt4/QtCore/qalgorithms.h:350
#7  0x00007fca90ffbbb2 in destroy () at /usr/include/qt4/QtCore/qalgorithms.h:358
#8  0x00007fca8e89fdad in *__GI_exit (status=0) at exit.c:75
#9  0x0000000000407745 in launch (argc=2, _name=0x25af988 "/usr/bin/konqueror", args=<value optimized out>, cwd=0x0, envc=0, envs=0x25af9ac "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x25af9b4 "Remus;1251191496;88423;6538_TIME15537432") at /tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kinit/kinit.cpp:676
#10 0x0000000000407f18 in handle_launcher_request (sock=7, who=<value optimized out>) at /tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kinit/kinit.cpp:1168
#11 0x00000000004084ae in handle_requests (waitForPid=0) at /tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kinit/kinit.cpp:1361
#12 0x0000000000408b3a in main (argc=2, argv=0x7fffb94090a8, envp=0x7fffb94090c0) at /tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kinit/kinit.cpp:1788

Reported using DrKonqi