Version:            (using KDE 4.1.4)
OS:                Linux
Installed from:    Ubuntu Packages

Just booted up Kubuntu/KDE after installing and a dialog from the KDE Crash Handler appeared with these details:

A Fatal Error Occurred
The application Update Notifier (update-notifier-kde) crashed and caused the signal 11 (SIGSEGV).
Please help us improve the software you use by filing a report at http://bugs.kde.org.

Application: Update Notifier (update-notifier-kde), signal SIGSEGV

Thread 1 (Thread 0xb7e4b6b0 (LWP 7922)):
[KCrash Handler]
#6  0xb4abb40b in pkgDepCache::CheckDep () from /usr/lib/libapt-pkg-libc6.8-6.so.4.6
#7  0xb4abb977 in pkgDepCache::DependencyState () from /usr/lib/libapt-pkg-libc6.8-6.so.4.6
#8  0xb4abdb70 in pkgDepCache::Update () from /usr/lib/libapt-pkg-libc6.8-6.so.4.6
#9  0xb4ac25a5 in pkgDepCache::Init () from /usr/lib/libapt-pkg-libc6.8-6.so.4.6
#10 0xb4ae311c in pkgCacheFile::Open () from /usr/lib/libapt-pkg-libc6.8-6.so.4.6
#11 0xb4b57579 in TmpGetCache () from /usr/lib/python2.5/site-packages/apt_pkg.so
#12 0x080cea39 in PyEval_EvalFrameEx ()
#13 0x080cfbf5 in PyEval_EvalFrameEx ()
#14 0x080d0345 in PyEval_EvalCodeEx ()
#15 0x08117891 in ?? ()
#16 0x0805d867 in PyObject_Call ()
#17 0x08063a7a in ?? ()
#18 0x0805d867 in PyObject_Call ()
#19 0x080c850c in PyEval_CallObjectWithKeywords ()
#20 0xb80032c7 in sip_api_invoke_slot () from /usr/lib/python2.5/site-packages/sip.so
#21 0xb7be8ffb in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtCore.so
#22 0xb7be9bdd in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtCore.so
#23 0xb7be9c84 in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtCore.so
#24 0xb7ab9a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#25 0xb7aba7e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#26 0xb7abfdb7 in ?? () from /usr/lib/libQtCore.so.4
#27 0xb7abfedc in ?? () from /usr/lib/libQtCore.so.4
#28 0xb7ab453f in QObject::event () from /usr/lib/libQtCore.so.4
#29 0xb696a8ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#30 0xb697272e in QApplication::notify () from /usr/lib/libQtGui.so.4
#31 0xb55fad1d in KApplication::notify () from /usr/lib/libkdeui.so.5
#32 0xb5c0d0c6 in sipKApplication::notify () from /usr/lib/python2.5/site-packages/PyKDE4/kdeui.so
#33 0xb7aa4e61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#34 0xb7ad2d81 in ?? () from /usr/lib/libQtCore.so.4
#35 0xb7acf520 in ?? () from /usr/lib/libQtCore.so.4
#36 0xb77f2718 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#37 0xb77f5dc3 in ?? () from /usr/lib/libglib-2.0.so.0
#38 0xb77f5f81 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#39 0xb7acf478 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#40 0xb6a04ea5 in ?? () from /usr/lib/libQtGui.so.4
#41 0xb7aa352a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#42 0xb7aa36ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#43 0xb7aa5da5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#44 0xb696a767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#45 0xb7570452 in ?? () from /usr/lib/python2.5/site-packages/PyQt4/QtGui.so
#46 0x080cea39 in PyEval_EvalFrameEx ()
#47 0x080d0345 in PyEval_EvalCodeEx ()
#48 0x080d0557 in PyEval_EvalCode ()
#49 0x080edf8f in PyRun_FileExFlags ()
#50 0x080ee25a in PyRun_SimpleFileExFlags ()
#51 0x080595e7 in Py_Main ()
#52 0x08058962 in main ()