Application that crashed: akregator
Version of the application: 1.4.50
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2))
Qt Version: 4.5.0
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I experienced the same bug. It happens on every popup inside kde-apps.org, no matter if I use akregator inside kontact or stand-alone.

 -- Backtrace:
Application: Akregator (akregator), signal: Aborted
[KCrash Handler]
#5  0x00007fc9cf52cfb5 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#6  0x00007fc9cf52ebc3 in *__GI_abort () at abort.c:88
#7  0x00007fc9cf571ce0 in malloc_printerr (action=2, str=0x7fc9cf633a86 "free(): invalid pointer", ptr=0x103d) at malloc.c:5999
#8  0x00007fc9d2edf7d9 in KHTMLPart::~KHTMLPart () from /usr/lib/libkhtml.so.5
#9  0x00007fc9d017b865 in QObject::event (this=0x2df2780, e=0x103d) at kernel/qobject.cpp:1101
#10 0x00007fc9d0d2378d in QApplicationPrivate::notify_helper (this=0x1c6e7a0, receiver=0x2df2780, e=0x2f4ad20) at kernel/qapplication.cpp:4084
#11 0x00007fc9d0d2b97a in QApplication::notify (this=0x7fffdd4469f0, receiver=0x2df2780, e=0x2f4ad20) at kernel/qapplication.cpp:4049
#12 0x00007fc9d215b06b in KApplication::notify () from /usr/lib/libkdeui.so.5
#13 0x00007fc9d016b75c in QCoreApplication::notifyInternal (this=0x7fffdd4469f0, receiver=0x2df2780, event=0x2f4ad20) at kernel/qcoreapplication.cpp:602
#14 0x00007fc9d016c3ca in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x1c3f6c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#15 0x00007fc9d01951e3 in postEventSourceDispatch (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#16 0x00007fc9c94ad20a in IA__g_main_context_dispatch (context=0x1c71130) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#17 0x00007fc9c94b08e0 in g_main_context_iterate (context=0x1c71130, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#18 0x00007fc9c94b0a7c in IA__g_main_context_iteration (context=0x1c71130, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#19 0x00007fc9d0194e6f in QEventDispatcherGlib::processEvents (this=0x1c3f2b0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:323
#20 0x00007fc9d0dbbbef in QGuiEventDispatcherGlib::processEvents (this=0x103d, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#21 0x00007fc9d016a002 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -582719136}) at kernel/qeventloop.cpp:149
#22 0x00007fc9d016a3cd in QEventLoop::exec (this=0x7fffdd4469a0, flags={i = -582719056}) at kernel/qeventloop.cpp:200
#23 0x00007fc9d016c694 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#24 0x0000000000408c97 in _start ()

This bug may be a duplicate of or related to bug 193146

Reported using DrKonqi