Application that crashed: kpackagekit
Version of the application: 0.4.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-16-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Produces only in this sequence. If press apply button, not OK button, krush will not happen.

 -- Backtrace:
Application: KPackageKit (kpackagekit), signal: Segmentation fault
[KCrash Handler]
#6  QWidget::window (this=0x8cb7870) at kernel/qwidget.cpp:3883
#7  0x01059d2e in QApplicationPrivate::dispatchEnterLeave (enter=0x8b4c7f0, leave=0x8cb7870) at kernel/qapplication.cpp:2527
#8  0x0105a17a in QApplicationPrivate::sendMouseEvent (receiver=0x8b4c7f0, event=0xbfb17540, alienWidget=0x8b4c7f0, nativeWidget=0x8b23728, buttonDown=0x18cdaa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2908
#9  0x010c87c0 in QETWidget::translateMouseEvent (this=0x8b23728, event=0xbfb18b8c) at kernel/qapplication_x11.cpp:4409
#10 0x010c7c4b in QApplication::x11ProcessEvent (this=0xbfb18f20, event=0xbfb18b8c) at kernel/qapplication_x11.cpp:3428
#11 0x010f4502 in x11EventSourceDispatch (s=0x8a83100, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#12 0x05b95e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#13 0x05b99730 in ?? () from /lib/libglib-2.0.so.0
#14 0x05b99863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#15 0x04dc602c in QEventDispatcherGlib::processEvents (this=0x8a5bf08, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#16 0x010f3be5 in QGuiEventDispatcherGlib::processEvents (this=0x8a5bf08, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#17 0x04d99c79 in QEventLoop::processEvents (this=0xbfb18e84, flags=) at kernel/qeventloop.cpp:149
#18 0x04d9a0ca in QEventLoop::exec (this=0xbfb18e84, flags=...) at kernel/qeventloop.cpp:201
#19 0x04d9c53f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#20 0x01052dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#21 0x0804e47b in _start ()

Reported using DrKonqi