Version:           0.5.4 (using KDE 4.3.5)
Compiler:          gcc 4.4.3 
OS:                Linux
Installed from:    Fedora RPMs

kpackagekit crashes when I cancel the software update search. Steps to reproduce the crash are as follows:

(1) start kpackagekit
(2) click 'software updates' button
(3) click 'cancel' button as kpackagekit is searching for software updates

Backtrace information follows:

Application: KPackageKit (kpackagekit), signal: Segmentation fault
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[KCrash Handler]
#5  QDBusAbstractInterface::internalPropGet (this=0x43007300750074, propname=0x3c6f036596 "Percentage") at qdbusabstractinterface.cpp:543
#6  0x0000003c6f0226f5 in percentage (this=<value optimized out>) at transactionproxy.h:57
#7  PackageKit::Transaction::percentage (this=<value optimized out>) at transaction.cpp:135
#8  0x000000307542a2d2 in KpkTransactionBar::updateUi (this=0x1ebc450) at /usr/src/debug/kpackagekit-0.5.4/libkpackagekit/KpkTransactionBar.cpp:159
#9  0x0000003075416bac in KpkTransactionBar::qt_metacall (this=0x1ebc450, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff9b255cc0)
    at /usr/src/debug/kpackagekit-0.5.4/x86_64-redhat-linux-gnu/libkpackagekit/moc_KpkTransactionBar.cpp:75
#10 0x0000003c6a95408c in QMetaObject::activate (sender=0x1f33830, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3112
#11 0x0000003c6f023a5a in PackageKit::Transaction::qt_metacall (this=0x1f33830, _c=InvokeMetaMethod, _id=0, _a=0x7fff9b255e90) at transaction.moc:198
#12 0x0000003c6a95408c in QMetaObject::activate (sender=0x1eb2dd0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3112
#13 0x0000003c6f02aac4 in PackageKit::TransactionProxy::qt_metacall (this=0x1eb2dd0, _c=InvokeMetaMethod, _id=3, _a=0x7fff9b256ce0) at transactionproxy.moc:235
#14 0x0000003c6b622e84 in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=..., slotIdx=<value optimized out>)
    at qdbusintegrator.cpp:891
#15 0x0000003c6b62a61f in QDBusCallDeliveryEvent::placeMetaCall(QObject*) () from /usr/lib64/libQtDBus.so.4
#16 0x0000003c6a94e401 in QObject::event (this=0x1eb2dd0, e=0x1fa3ef0) at kernel/qobject.cpp:1110
#17 0x000000307358f65c in QApplicationPrivate::notify_helper (this=0x1b58670, receiver=0x1eb2dd0, e=0x1fa3ef0) at kernel/qapplication.cpp:4065
#18 0x00000030735968ce in QApplication::notify (this=<value optimized out>, receiver=0x1eb2dd0, e=0x1fa3ef0) at kernel/qapplication.cpp:4030
#19 0x00000030741f68e6 in KApplication::notify (this=0x7fff9b257680, receiver=0x1eb2dd0, event=0x1fa3ef0) at /usr/src/debug/kdelibs-4.3.5/kdeui/kernel/kapplication.cpp:302
#20 0x0000003c6a93ee6c in QCoreApplication::notifyInternal (this=0x7fff9b257680, receiver=0x1eb2dd0, event=0x1fa3ef0) at kernel/qcoreapplication.cpp:610
#21 0x0000003c6a93fa42 in sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x1b33970) at kernel/qcoreapplication.h:213
#22 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x1b33970) at kernel/qcoreapplication.cpp:1247
#23 0x0000003c6a967573 in sendPostedEvents (s=<value optimized out>) at kernel/qcoreapplication.h:218
#24 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#25 0x000000369503920e in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#26 0x000000369503cbf8 in ?? () from /lib64/libglib-2.0.so.0
#27 0x000000369503cd1a in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#28 0x0000003c6a9671e6 in QEventDispatcherGlib::processEvents (this=0x1b33180, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#29 0x0000003073621ffe in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#30 0x0000003c6a93d772 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x0000003c6a93db44 in QEventLoop::exec (this=0x7fff9b2575d0, flags=...) at kernel/qeventloop.cpp:201
#32 0x0000003c6a93fcd9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0x0000000000406082 in main (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kpackagekit-0.5.4/KPackageKit/main.cpp:66