Application: kpackagekit (0.5.4)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-21-generic-pae i686
Distribution: Ubuntu lucid (development branch)

-- Information about the crash:
It happened twice, on Kubuntu Lucid beta 2. I don't know what could be the problem, both the times I searched for a package and then close it, after pressing X button, the crash report window opened.

The crash can be reproduced some of the time.

 -- Backtrace:
Application: KPackageKit (kpackagekit), signal: Segmentation fault
[Current thread is 1 (Thread 0xb54ab710 (LWP 2968))]

Thread 2 (Thread 0xb3a37b70 (LWP 2980)):
#0  0xb5b49e16 in *__GI_clock_gettime (clock_id=-1246437388, tp=0xb3a36fb8) at ../sysdeps/unix/clock_gettime.c:100
#1  0xb72516fb in qt_gettime () at kernel/qcore_unix.cpp:111
#2  0xb7256825 in QTimerInfoList::updateCurrentTime (this=0x8f2001c) at kernel/qeventdispatcher_unix.cpp:340
#3  0xb725686a in QTimerInfoList::timerWait (this=0x8f2001c, tm=...) at kernel/qeventdispatcher_unix.cpp:443
#4  0xb7254818 in timerSourcePrepareHelper (src=<value optimized out>, timeout=0xb3a370cc) at kernel/qeventdispatcher_glib.cpp:136
#5  0xb72548a5 in timerSourcePrepare (source=0x0, timeout=0xb5b4dff4) at kernel/qeventdispatcher_glib.cpp:169
#6  0xb5abaaca in g_main_context_prepare () from /lib/libglib-2.0.so.0
#7  0xb5abaee9 in ?? () from /lib/libglib-2.0.so.0
#8  0xb5abb4b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#9  0xb725460f in QEventDispatcherGlib::processEvents (this=0x8ede500, flags=...) at kernel/qeventdispatcher_glib.cpp:414
#10 0xb7227059 in QEventLoop::processEvents (this=0xb3a37290, flags=) at kernel/qeventloop.cpp:149
#11 0xb72274aa in QEventLoop::exec (this=0xb3a37290, flags=...) at kernel/qeventloop.cpp:201
#12 0xb71235a8 in QThread::exec (this=0x8d6c130) at thread/qthread.cpp:487
#13 0xb7206c1b in QInotifyFileSystemWatcherEngine::run (this=0x8d6c130) at io/qfilesystemwatcher_inotify.cpp:248
#14 0xb712632e in QThreadPrivate::start (arg=0x8d6c130) at thread/qthread_unix.cpp:248
#15 0xb632c96e in start_thread (arg=0xb3a37b70) at pthread_create.c:300
#16 0xb615ea0e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb54ab710 (LWP 2968)):
[KCrash Handler]
#6  0xb723c65b in QObjectPrivate::isSignalConnected (sender=0x8e7be88, m=0xb733c198, local_signal_index=0, argv=0xbfb8ee34) at kernel/qobject_p.h:227
#7  QMetaObject::activate (sender=0x8e7be88, m=0xb733c198, local_signal_index=0, argv=0xbfb8ee34) at kernel/qobject.cpp:3218
#8  0xb728ce29 in QAbstractItemModel::dataChanged (this=0x8e7be88, _t1=..., _t2=...) at .moc/release-shared/moc_qabstractitemmodel.cpp:148
#9  0xb70a4acd in KpkPackageModel::uncheckAll() () from /usr/lib/libkpackagekitlib.so
#10 0xb3181b63 in ?? () from /usr/lib/kde4/kcm_kpk_addrm.so
#11 0xb31820cb in ?? () from /usr/lib/kde4/kcm_kpk_addrm.so
#12 0xb722dc9a in QMetaObject::metacall (object=0x8e677e8, cl=QMetaObject::WriteProperty, idx=149321704, argv=0xbfb8efac) at kernel/qmetaobject.cpp:237
#13 0xb723c3d5 in QMetaObject::activate (sender=0x8e5c468, m=0xb318ea10, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3293
#14 0xb317e6a7 in ?? () from /usr/lib/kde4/kcm_kpk_addrm.so
#15 0xb74a61da in KCModuleProxy::save (this=0x8e4e870) at ../../kutils/kcmoduleproxy.cpp:279
#16 0xb74a1888 in KCMultiDialogPrivate::apply (this=0x8c55410) at ../../kutils/kcmultidialog.cpp:250
#17 0xb74a42c3 in KCMultiDialog::qt_metacall (this=0x8c474a0, _c=QMetaObject::InvokeMetaMethod, _id=79, _a=0xbfb8f28c) at ./kcmultidialog.moc:95
#18 0xb722dc9a in QMetaObject::metacall (object=0x8c474a0, cl=QMetaObject::WriteProperty, idx=79, argv=0xbfb8f28c) at kernel/qmetaobject.cpp:237
#19 0xb723c3d5 in QMetaObject::activate (sender=0x8c474a0, m=0x80563ac, local_signal_index=7, argv=0x0) at kernel/qobject.cpp:3293
#20 0xb7614ea7 in KDialog::applyClicked (this=0x8c474a0) at ./kdialog.moc:246
#21 0xb761731a in KDialog::slotButtonClicked (this=0x8c474a0, button=8) at ../../kdeui/dialogs/kdialog.cpp:866
#22 0xb7619559 in KDialog::qt_metacall (this=0x8c474a0, _c=QMetaObject::InvokeMetaMethod, _id=33, _a=0xbfb8f4b8) at ./kdialog.moc:190
#23 0xb76f686a in KPageDialog::qt_metacall (this=0x8c474a0, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfb8f4b8) at ./kpagedialog.moc:70
#24 0xb74a41fa in KCMultiDialog::qt_metacall (this=0x8c474a0, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfb8f4b8) at ./kcmultidialog.moc:86
#25 0xb722dc9a in QMetaObject::metacall (object=0x8c474a0, cl=QMetaObject::WriteProperty, idx=69, argv=0xbfb8f4b8) at kernel/qmetaobject.cpp:237
#26 0xb723c3d5 in QMetaObject::activate (sender=0x8c55460, m=0xb733b0f8, local_signal_index=0, argv=0xbfb8f4b8) at kernel/qobject.cpp:3293
#27 0xb7241b13 in QSignalMapper::mapped (this=0x8c55460, _t1=8) at .moc/release-shared/moc_qsignalmapper.cpp:101
#28 0xb7242d8d in QSignalMapper::map (this=0x8c55460, sender=0x8c7f428) at kernel/qsignalmapper.cpp:266
#29 0xb7242f6e in QSignalMapper::map (this=0x8c55460) at kernel/qsignalmapper.cpp:257
#30 0xb724303b in QSignalMapper::qt_metacall (this=0x8c55460, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfb8f658) at .moc/release-shared/moc_qsignalmapper.cpp:87
#31 0xb722dc9a in QMetaObject::metacall (object=0x8c55460, cl=QMetaObject::WriteProperty, idx=8, argv=0xbfb8f658) at kernel/qmetaobject.cpp:237
#32 0xb723c3d5 in QMetaObject::activate (sender=0x8c7f428, m=0xb701f8c4, local_signal_index=2, argv=0xbfb8f658) at kernel/qobject.cpp:3293
#33 0xb6e0f479 in QAbstractButton::clicked (this=0x8c7f428, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:206
#34 0xb6aeeea9 in QAbstractButtonPrivate::emitClicked (this=0x8c55900) at widgets/qabstractbutton.cpp:546
#35 0xb6aefcf4 in QAbstractButtonPrivate::click (this=0x8c55900) at widgets/qabstractbutton.cpp:539
#36 0xb6aeffae in QAbstractButton::mouseReleaseEvent (this=0x8c7f428, e=0xbfb8fd90) at widgets/qabstractbutton.cpp:1121
#37 0xb67427f8 in QWidget::event (this=0x8c7f428, event=0xbfb8fd90) at kernel/qwidget.cpp:7998
#38 0xb6aeed4e in QAbstractButton::event (this=0x8c7f428, e=0x0) at widgets/qabstractbutton.cpp:1080
#39 0xb6b991f2 in QPushButton::event (this=0x8c7f428, e=0xbfb8fd90) at widgets/qpushbutton.cpp:679
#40 0xb66e44dc in QApplicationPrivate::notify_helper (this=0x8bc5ce8, receiver=0x8c7f428, e=0xbfb8fd90) at kernel/qapplication.cpp:4300
#41 0xb66eb9f7 in QApplication::notify (this=0xbfb9064c, receiver=0x8c7f428, e=0xbfb8fd90) at kernel/qapplication.cpp:3865
#42 0xb76b5f2a in KApplication::notify (this=0xbfb9064c, receiver=0x8c7f428, event=0xbfb8fd90) at ../../kdeui/kernel/kapplication.cpp:302
#43 0xb7228a3b in QCoreApplication::notifyInternal (this=0xbfb9064c, receiver=0x8c7f428, event=0xbfb8fd90) at kernel/qcoreapplication.cpp:704
#44 0xb66ea952 in QCoreApplication::sendEvent (receiver=0x8c7f428, event=0xbfb8fd90, alienWidget=0x8c7f428, nativeWidget=0x8c474a0, buttonDown=0xb7028058, lastMouseReceiver=..., spontaneous=true)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#45 QApplicationPrivate::sendMouseEvent (receiver=0x8c7f428, event=0xbfb8fd90, alienWidget=0x8c7f428, nativeWidget=0x8c474a0, buttonDown=0xb7028058, lastMouseReceiver=..., spontaneous=true)
    at kernel/qapplication.cpp:2965
#46 0xb6776088 in QETWidget::translateMouseEvent (this=0x8c474a0, event=0xbfb902ac) at kernel/qapplication_x11.cpp:4368
#47 0xb6775511 in QApplication::x11ProcessEvent (this=0xbfb9064c, event=0xbfb902ac) at kernel/qapplication_x11.cpp:3379
#48 0xb67a460a in x11EventSourceDispatch (s=0x8bc9f68, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#49 0xb5ab75e5 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#50 0xb5abb2d8 in ?? () from /lib/libglib-2.0.so.0
#51 0xb5abb4b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#52 0xb72545d5 in QEventDispatcherGlib::processEvents (this=0x8ba8fb0, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#53 0xb67a4135 in QGuiEventDispatcherGlib::processEvents (this=0x8ba8fb0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#54 0xb7227059 in QEventLoop::processEvents (this=0xbfb905a4, flags=) at kernel/qeventloop.cpp:149
#55 0xb72274aa in QEventLoop::exec (this=0xbfb905a4, flags=...) at kernel/qeventloop.cpp:201
#56 0xb722b69f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#57 0xb66e4577 in QApplication::exec () at kernel/qapplication.cpp:3579
#58 0x0804d44b in _start ()

Reported using DrKonqi