Application that crashed: kpackagekitsmarticon
Version of the application: 0.5.2
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.9-174.fc12.i686 i686

What I was doing when the application crashed:
Hello.

KPackage crashes after doing these steps (always reproducible):

1. Download the 'YUM for linux' package from http://get.adobe.com/flashplayer/.
2. Open it with KPackage kit and click Install in the "Do you want to install these...?" dialog
3. In the "Additional changes" window, click Continue.
4. In the authenticate dialog, enter password. Note the window says "Auth. is required to install a signed package", though the package is unsigned.
5. In the "Installing unsigned software" dialog, click Yes.
6. In the "Authenticate" dialog, click CANCEL.
7. Now you get an error dialog saying "An error occured". Click OK. 
8. You also get an "Authorization failed" dialog, click OK.
9. Click "cancel" in the main window (Installing file). Crash occurs.

System:
Fedora 12, KDE 4.3.3, KPackageKit 0.5.2 release 1 (fedora RPM)

 -- Backtrace:
Application: KPackageKit (kpackagekitsmarticon), signal: Segmentation fault
[KCrash Handler]
#6  0x06ee776b in PackageKit::Transaction::cancel() () from /usr/lib/libpackagekit-qt.so.12
#7  0x06f7b072 in KpkTransaction::slotButtonClicked(int) () from /usr/lib/libkpackagekitlib.so
#8  0x067fcf8c in KDialog::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkdeui.so.5
#9  0x06f7be1b in KpkTransaction::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkpackagekitlib.so
#10 0x05766c0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x05767843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x057697e4 in QSignalMapper::mapped(int) () from /usr/lib/libQtCore.so.4
#13 0x0576a08e in QSignalMapper::map(QObject*) () from /usr/lib/libQtCore.so.4
#14 0x0576a26f in QSignalMapper::map() () from /usr/lib/libQtCore.so.4
#15 0x0576aa4b in QSignalMapper::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x05766c0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x05767059 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/libQtCore.so.4
#18 0x064332a2 in QAbstractButton::clicked(bool) () from /usr/lib/libQtGui.so.4
#19 0x06159b0a in ?? () from /usr/lib/libQtGui.so.4
#20 0x0615b755 in ?? () from /usr/lib/libQtGui.so.4
#21 0x0615b9f1 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#22 0x05dfbd6f in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x061599af in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x0620402e in QPushButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x05da6b24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#26 0x05daea90 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x0689502b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#28 0x05750d73 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#29 0x05dadb97 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#30 0x05e1c4b8 in ?? () from /usr/lib/libQtGui.so.4
#31 0x05e1b91d in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#32 0x05e46c92 in ?? () from /usr/lib/libQtGui.so.4
#33 0x00cc4128 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#34 0x00cc7a58 in ?? () from /lib/libglib-2.0.so.0
#35 0x00cc7b84 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#36 0x0577bb6d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x05e46356 in ?? () from /usr/lib/libQtGui.so.4
#38 0x0574f2aa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#39 0x0574f70a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#40 0x05751bf7 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#41 0x05da69a8 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#42 0x080506a9 in _start ()

Reported using DrKonqi