Application that crashed: kpackagekit
Version of the application: 0.5.2
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.6-166.fc12.i686 i686
Distribution: "Fedora release 12 (Constantine)"

What I was doing when the application crashed:
I was removing mplayer package.
Mplayer had been causing issues after upgrading from F10 to F12. So i was in the process of removing it.
kpackagekit was freshly installed and this was the second task i'd performed with it.

 -- Backtrace:
Application: KPackageKit (kpackagekit), signal: Segmentation fault
[KCrash Handler]
#6  0x0418f857 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#7  0x00aa3f04 in PackageKit::Transaction::destroyed(QString const&) () from /usr/lib/libpackagekit-qt.so.12
#8  0x00aaa8a5 in PackageKit::TransactionPrivate::finished(QString const&, unsigned int) () from /usr/lib/libpackagekit-qt.so.12
#9  0x00aac396 in PackageKit::TransactionPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libpackagekit-qt.so.12
#10 0x0418ec0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x0418f843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x00aadc6a in PackageKit::TransactionProxy::Finished(QString const&, unsigned int) () from /usr/lib/libpackagekit-qt.so.12
#13 0x00aae9e3 in PackageKit::TransactionProxy::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libpackagekit-qt.so.12
#14 0x00867a3c in ?? () from /usr/lib/libQtDBus.so.4
#15 0x0086f9a8 in ?? () from /usr/lib/libQtDBus.so.4
#16 0x04188f96 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#17 0x0478ab24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#18 0x04792281 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x0521a02b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#20 0x04178d73 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#21 0x04179972 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#22 0x04179b2e in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#23 0x041a3f40 in ?? () from /usr/lib/libQtCore.so.4
#24 0x00ba2128 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#25 0x00ba5a58 in ?? () from /lib/libglib-2.0.so.0
#26 0x00ba5b84 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#27 0x041a3b6d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#28 0x0482a356 in ?? () from /usr/lib/libQtGui.so.4
#29 0x041772aa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#30 0x0417770a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#31 0x00515ea3 in KpkReviewChanges::exec(QFlags<KpkReviewChanges::OperationMode>) () from /usr/lib/libkpackagekitlib.so
#32 0x02866123 in ?? () from /usr/lib/kde4/kcm_kpk_addrm.so
#33 0x02866b4b in ?? () from /usr/lib/kde4/kcm_kpk_addrm.so
#34 0x0418ec0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#35 0x0418f843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#36 0x02862c78 in QWidget::style() const () from /usr/lib/kde4/kcm_kpk_addrm.so
#37 0x059930da in KCModuleProxy::save() () from /usr/lib/libkutils.so.4
#38 0x0598d678 in ?? () from /usr/lib/libkutils.so.4
#39 0x0598fd93 in KCMultiDialog::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkutils.so.4
#40 0x0418ec0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#41 0x0418f843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#42 0x0517d1b8 in KDialog::applyClicked() () from /usr/lib/libkdeui.so.5
#43 0x0517f987 in KDialog::slotButtonClicked(int) () from /usr/lib/libkdeui.so.5
#44 0x05181f8c in KDialog::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdeui.so.5
#45 0x0524b27b in KPageDialog::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdeui.so.5
#46 0x0598fcdb in KCMultiDialog::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkutils.so.4
#47 0x0418ec0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#48 0x0418f843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#49 0x041917e4 in QSignalMapper::mapped(int) () from /usr/lib/libQtCore.so.4
#50 0x0419208e in QSignalMapper::map(QObject*) () from /usr/lib/libQtCore.so.4
#51 0x0419226f in QSignalMapper::map() () from /usr/lib/libQtCore.so.4
#52 0x04192a4b in QSignalMapper::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtCore.so.4
#53 0x0418ec0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#54 0x0418f059 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/libQtCore.so.4
#55 0x04e172a2 in QAbstractButton::clicked(bool) () from /usr/lib/libQtGui.so.4
#56 0x04b3db0a in ?? () from /usr/lib/libQtGui.so.4
#57 0x04b3f755 in ?? () from /usr/lib/libQtGui.so.4
#58 0x04b3f9f1 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#59 0x047dfd6f in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#60 0x04b3d9af in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#61 0x04be802e in QPushButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#62 0x0478ab24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#63 0x04792a90 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#64 0x0521a02b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#65 0x04178d73 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#66 0x04791b97 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#67 0x048004b8 in ?? () from /usr/lib/libQtGui.so.4
#68 0x047ff91d in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#69 0x0482ac92 in ?? () from /usr/lib/libQtGui.so.4
#70 0x00ba2128 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#71 0x00ba5a58 in ?? () from /lib/libglib-2.0.so.0
#72 0x00ba5b84 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#73 0x041a3b6d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#74 0x0482a356 in ?? () from /usr/lib/libQtGui.so.4
#75 0x041772aa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#76 0x0417770a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#77 0x04179bf7 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#78 0x0478a9a8 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#79 0x0804cd6b in _start ()

Reported using DrKonqi