Application that crashed: konqueror
Version of the application: 4.3.4 (KDE 4.3.4)
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.31-1-686 i686
Distribution: Debian GNU/Linux unstable (sid)

What I was doing when the application crashed:
I looked for around on two sites:

maps.google.de with Webkit kpart
velly.de with KHTML kpart

When I closed the browser, it crashed.

 -- Backtrace:
Application: Konqueror (kdeinit4), signal: Aborted
[Current thread is 1 (Thread 0xb5786700 (LWP 2312))]

Thread 2 (Thread 0xa948fb70 (LWP 2860)):
#0  0xb779f424 in __kernel_vsyscall ()
#1  0xb6093b83 in __lll_lock_wait_private () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/lowlevellock.S:95
#2  0xb60288ed in _L_lock_9648 () from /lib/i686/cmov/libc.so.6
#3  0xb60270a6 in *__GI___libc_free (mem=0xdcb5760) at malloc.c:3736
#4  0xb5f20076 in g_free () from /lib/libglib-2.0.so.0
#5  0xb5f17927 in ?? () from /lib/libglib-2.0.so.0
#6  0xb76bedc0 in ~QEventDispatcherGlib (this=0xd7fbbc8, __in_chrg=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:361
#7  0xb75a2698 in QThreadPrivate::finish (arg=0x894e788) at thread/qthread_unix.cpp:212
#8  0xb75a25ea in ~__pthread_cleanup_class (arg=0x894e788) at /usr/include/pthread.h:533
#9  QThreadPrivate::start (arg=0x894e788) at thread/qthread_unix.cpp:190
#10 0xb5eca585 in start_thread (arg=0xa948fb70) at pthread_create.c:300
#11 0xb60862be in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb5786700 (LWP 2312)):
[KCrash Handler]
#6  0xb779f424 in __kernel_vsyscall ()
#7  0xb5fe18e0 in *__GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#8  0xb5fe4e15 in *__GI_abort () at abort.c:88
#9  0xb60186c5 in __libc_message (do_abort=2, fmt=0xb60df0e8 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:173
#10 0xb6022824 in malloc_printerr (action=2, str=0xb60dbc2b "free(): invalid pointer", ptr=0xa22f148) at malloc.c:6239
#11 0xb60240b3 in _int_free (av=0xb60fb3c0, p=0xa22f140) at malloc.c:4772
#12 0xb60270ad in *__GI___libc_free (mem=0xa22f148) at malloc.c:3738
#13 0xb71f406e in ?? () from /usr/lib/libX11.so.6
#14 0xb71f46ad in _XReply () from /usr/lib/libX11.so.6
#15 0xb71e81b7 in XSync () from /usr/lib/libX11.so.6
#16 0xb5b69232 in XRenderFindDisplay () from /usr/lib/libXrender.so.1
#17 0xb5b67ab5 in XRenderChangePicture () from /usr/lib/libXrender.so.1
#18 0xb65030c4 in QX11PaintEngine::end (this=0xa3992b0) at painting/qpaintengine_x11.cpp:573
#19 0xb645d520 in QPainter::end (this=0xaaa77c0) at painting/qpainter.cpp:1864
#20 0xb645d668 in ~QPainter (this=0xaaa77c0, __in_chrg=<value optimized out>) at painting/qpainter.cpp:1423
#21 0xb4c2d118 in ?? () from /usr/lib/libQtWebKit.so.4
#22 0xb499a49c in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#23 0xb488deb7 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#24 0xb48a5648 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#25 0xb4889bf7 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#26 0xb48bbac9 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#27 0xb4e5ff28 in ?? () from /usr/lib/libQtWebKit.so.4
#28 0xb47329af in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#29 0xb4731b51 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#30 0xb47c0c7d in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#31 0xb47c0d71 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#32 0xb4b20cd2 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#33 0xb4b20da7 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#34 0xb4c4c8c3 in ?? () from /usr/lib/libQtWebKit.so.4
#35 0xb76a204f in QObjectPrivate::deleteChildren (this=0x894b550) at kernel/qobject.cpp:1846
#36 0xb76a984b in ~QObject (this=0xbfc5c98c, __in_chrg=<value optimized out>) at kernel/qobject.cpp:836
#37 0xb7695a76 in ~QCoreApplication (this=0xbfc5c98c, __in_chrg=<value optimized out>) at kernel/qcoreapplication.cpp:537
#38 0xb633d704 in ~QApplication (this=0xbfc5c98c, __in_chrg=<value optimized out>) at kernel/qapplication.cpp:1075
#39 0xb6d7cb1a in ~KApplication (this=0xbfc5c98c, __in_chrg=<value optimized out>) at ../../kdeui/kernel/kapplication.cpp:893
#40 0xb31e46d7 in ~KonquerorApplication (argc=2, argv=0x88bf320) at ../../../../apps/konqueror/src/konqapplication.h:29
#41 kdemain (argc=2, argv=0x88bf320) at ../../../../apps/konqueror/src/konqmain.cpp:272
#42 0x0804e291 in launch (argc=2, _name=0x89072dc "/usr/bin/konqueror", args=0x89072f8 "", cwd=0x0, envc=0, envs=0x89072fd "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x805105f "0") at ../../kinit/kinit.cpp:677
#43 0x0804ea15 in handle_launcher_request (sock=8, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#44 0x0804ee5b in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#45 0x0804f689 in main (argc=2, argv=0xbfc5d3d4, envp=0xbfc5d3e0) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi