Version:            (using KDE 3.1.1)
Installed from:    compiled sources
Compiler:          gcc version 3.2
OS:          Linux (i686) release 2.4.19-4GB

I closed the Control Center after setting my default CUPS printer. I wasn't like root but like simple user.

[New Thread 1024 (LWP 1402)]
0x410c78c9 in wait4 () from /lib/libc.so.6
#0  0x410c78c9 in wait4 () from /lib/libc.so.6
#1  0x41142c90 in __DTOR_END__ () from /lib/libc.so.6
#2  0x40f1fa93 in waitpid () from /lib/libpthread.so.0
#3  0x4068df0d in KCrash::defaultCrashHandler(int) ()
   from /opt/kde3/lib/libkdecore.so.4
#4  0x40f1d12b in pthread_sighandler () from /lib/libpthread.so.0
#5  <signal handler called>
#6  0x08261238 in ?? ()
#7  0x41524e1a in KMMainView::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#8  0x40a0cf23 in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#9  0x40a0d1bf in QObject::activate_signal(int, QString) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#10 0x415266b7 in KMPrinterView::printerSelected(QString const&) ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#11 0x415268b4 in KMPrinterView::qt_emit(int, QUObject*) ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#12 0x40a0cecf in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#13 0x40a0d1bf in QObject::activate_signal(int, QString) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#14 0x4151aa78 in KMIconView::printerSelected(QString const&) ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#15 0x4151a685 in KMIconView::slotSelectionChanged() ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#16 0x4151ab0a in KMIconView::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#17 0x40a0cf23 in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#18 0x40a0cdd0 in QObject::activate_signal(int) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#19 0x40ced046 in QIconView::selectionChanged() ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#20 0x4151a440 in KMIconView::setPrinterList(QPtrList<KMPrinter>*) ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#21 0x4152631d in KMPrinterView::setPrinterList(QPtrList<KMPrinter>*) ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#22 0x41521249 in KMMainView::slotTimer() ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#23 0x41524d26 in KMMainView::qt_invoke(int, QUObject*) ()
   from /opt/kde3/lib/libkdeprint_management.so.4
#24 0x40a0ce9d in QObject::activate_signal(QConnectionList*, QUObject*) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#25 0x40a0cdd0 in QObject::activate_signal(int) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#26 0x40cc95f6 in QTimer::timeout() () from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#27 0x40a2bf23 in QTimer::event(QEvent*) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#28 0x409b1192 in QApplication::internalNotify(QObject*, QEvent*) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#29 0x409b0979 in QApplication::notify(QObject*, QEvent*) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#30 0x40600239 in KApplication::notify(QObject*, QEvent*) ()
   from /opt/kde3/lib/libkdecore.so.4
#31 0x4098cc2c in QEventLoop::activateTimers() ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#32 0x4096c21c in QEventLoop::processEvents(unsigned) ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#33 0x409c410b in QEventLoop::enterLoop() ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#34 0x409c3fb4 in QEventLoop::exec() ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#35 0x409b13e0 in QApplication::exec() ()
   from /KDE/HEAD/qt-copy/lib/libqt-mt.so.3
#36 0x4129a9df in main () from /opt/kde3/lib/kcontrol.so
#37 0x0804cbc7 in launch(int, char const*, char const*, char const*, int, char const*, bool, char const*, bool, char const*) ()
#38 0x0804d99c in handle_launcher_request(int) ()
#39 0x0804deac in handle_requests(int) ()
#40 0x0804ed63 in main ()
#41 0x410424a2 in __libc_start_main () from /lib/libc.so.6