Version:            (using KDE KDE 3.5.6)
Installed from:    Ubuntu Packages

After opening System Settings, I opened Printers.  After about 2-3 seconds, a crash dialog appeared with the following backtrace:

(no debugging symbols found)
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1232685392 (LWP 21708)]
[KCrash handler]
#6  0xb614d817 in KMCupsManager::validatePluginActions (this=0x826e780, 
    coll=0x829abe8, pr=0x0)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/cups/kmcupsmanager.cpp:859
#7  0xb62f220d in KMMainView::slotPrinterSelected (this=0x81e4d20, 
    prname=@0x832a9b0)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmmainview.cpp:449
#8  0xb634bd48 in KMMainView::qt_invoke (this=0x81e4d20, _id=65, 
    _o=0xbfc945e8) at ./kmmainview.moc:186
#9  0xb6f21957 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#10 0xb6f21e8c in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#11 0xb63010e0 in KMPrinterView::printerSelected (this=0x81ea270, 
    t0=@0x8329828) at ./kmprinterview.moc:98
#12 0xb6301172 in KMPrinterView::qt_emit (this=0x81ea270, _id=4, 
    _o=0xbfc94718) at ./kmprinterview.moc:131
#13 0xb6f21a58 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#14 0xb6f21e8c in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#15 0xb62f9393 in KMIconView::printerSelected (this=0x81eda90, t0=@0xbfc94798)
    at ./kmiconview.moc:118
#16 0xb62f95f5 in KMIconView::slotSelectionChanged (this=0x81eda90)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmiconview.cpp:218
#17 0xb62f976b in KMIconView::qt_invoke (this=0x81eda90, _id=81, 
    _o=0xbfc9485c) at ./kmiconview.moc:125
#18 0xb6f21957 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#19 0xb6f223fc in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#20 0xb72e4156 in QIconView::selectionChanged () from /usr/lib/libqt-mt.so.3
#21 0xb62fa247 in KMIconView::setPrinterList (this=0x81eda90, list=0x826e7cc)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmiconview.cpp:191
#22 0xb63121e1 in KMPrinterView::setPrinterList (this=0x81ea270, 
    list=0x826e7cc)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmprinterview.cpp:60
#23 0xb6312b32 in KMMainView::slotTimer (this=0x81e4d20)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmmainview.cpp:380
#24 0xb634bb84 in KMMainView::qt_invoke (this=0x81e4d20, _id=46, 
    _o=0xbfc949fc) at ./kmmainview.moc:167
#25 0xb6f21a84 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#26 0xb6f223fc in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#27 0xb72b000a in QTimer::timeout () from /usr/lib/libqt-mt.so.3
#28 0xb62efb68 in KMTimer::releaseTimer (this=0x82146a8, do_emit=false)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmtimer.cpp:70
#29 0xb62efba5 in KMTimer::release (this=0x82146a8, do_emit=true)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmtimer.cpp:61
#30 0xb6301d94 in KMMainView::slotUpdatePossible (this=0x81e4d20, flag=true)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmmainview.cpp:961
#31 0xb634be06 in KMMainView::qt_invoke (this=0x81e4d20, _id=71, 
    _o=0xbfc94b88) at ./kmmainview.moc:192
#32 0xb6f21a84 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#33 0xb6f21cb1 in QObject::activate_signal_bool () from /usr/lib/libqt-mt.so.3
#34 0xb621b6ab in KMManager::updatePossible (this=0x826e780, t0=true)
    at ./kmmanager.moc:85
#35 0xb621ba1f in KMManager::setUpdatePossible (this=0x0, value=false)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/kmmanager.cpp:553
#36 0xb6177fc3 in KMCupsManager::slotConnectionSuccess (this=0x826e780)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/cups/kmcupsmanager.cpp:943
#37 0xb617815a in KMCupsManager::qt_invoke (this=0x826e780, _id=5, 
    _o=0xbfc94ce4) at ./kmcupsmanager.moc:100
#38 0xb6f21957 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#39 0xb7921bb1 in KNetwork::KClientSocketBase::connected (this=0x82f36d0, 
    t0=@0x831a600) at ./kclientsocketbase.moc:180
#40 0xb7926e42 in KNetwork::KStreamSocket::connectionSucceeded (
    this=0x82f36d0, peer=@0x831a600)
    at /root/kdelibs/kdelibs-3.5.6/./kdecore/network/kstreamsocket.cpp:365
#41 0xb79277cb in KNetwork::KStreamSocket::connectionEvent (this=0x82f36d0)
    at /root/kdelibs/kdelibs-3.5.6/./kdecore/network/kstreamsocket.cpp:283
#42 0xb7931020 in KNetwork::KStreamSocket::qt_invoke (this=0x82f36d0, _id=6, 
    _o=0xbfc94e48) at ./kstreamsocket.moc:97
#43 0xb7931086 in KNetwork::KBufferedSocket::qt_invoke (this=0x82f36d0, 
    _id=6, _o=0xbfc94e48) at ./kbufferedsocket.moc:100
#44 0xb6f21957 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#45 0xb72adf44 in QSignal::signal () from /usr/lib/libqt-mt.so.3
#46 0xb6f418ea in QSignal::activate () from /usr/lib/libqt-mt.so.3
#47 0xb6f49300 in QSingleShotTimer::event () from /usr/lib/libqt-mt.so.3
#48 0xb6eb8b88 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#49 0xb6eba9b7 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#50 0xb78cbc82 in KApplication::notify (this=0xbfc97368, receiver=0x81b2a48, 
    event=0xbfc95198)
    at /root/kdelibs/kdelibs-3.5.6/./kdecore/kapplication.cpp:550
#51 0xb6e4b389 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#52 0xb6eab5d3 in QEventLoop::activateTimers () from /usr/lib/libqt-mt.so.3
#53 0xb6e5fec5 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#54 0xb6ed31d0 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#55 0xb6eba79c in QApplication::processEvents () from /usr/lib/libqt-mt.so.3
#56 0xb6eba7c7 in QApplication::processEvents () from /usr/lib/libqt-mt.so.3
#57 0xb63035ca in KMMainView::setBrowsingStatus (this=0x81e4d20)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmmainview.cpp:341
#58 0xb63052d0 in KMMainView::initActions (this=0x81e4d20)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmmainview.cpp:216
#59 0xb633f878 in KMMainView (this=0x81e4d20, parent=0x81e4a88, 
    name=0xb636fa3a "MainView", coll=0x0)
    at /root/kdelibs/kdelibs-3.5.6/./kdeprint/management/kmmainview.cpp:126
#60 0xb636e69c in KCMPrintMgr (this=0x81e4a88, parent=0x81d9f40, 
    name=0xb73025c0 "unnamed")
    at /root/kdebase/kdebase-3.5.6/./kdeprint/printmgr/kcmprintmgr.cpp:44
#61 0xb636f35f in KGenericFactory<KCMPrintMgr, QWidget>::createObject (
    this=0x81e29a8, parent=0x81d9f40, name=0xb73025c0 "unnamed", 
    className=0xb7eaeaa3 "KCModule", args=@0x81da0e0)
    at /usr/include/kde/kgenericfactory.tcc:157
#62 0xb781d031 in KLibFactory::create (this=0x81e29a8, parent=0x81d9f40, 
    name=0xb73025c0 "unnamed", classname=0xb7eaeaa3 "KCModule", 
    args=@0x81da0e0)
    at /root/kdelibs/kdelibs-3.5.6/./kdecore/klibloader.cpp:83
#63 0xb7bfcb22 in KCModuleLoader::load (mod=@0x81da110, libname=@0xbfc96360, 
    loader=0x81e1dd8, report=KCModuleLoader::Inline, parent=0x81d9f40, 
    name=0xb73025c0 "unnamed", args=@0x81da0e0)
    at /root/kdelibs/kdelibs-3.5.6/./kparts/componentfactory.h:67
#64 0xb7bfda37 in KCModuleLoader::loadModule (mod=@0x81da110, 
    report=KCModuleLoader::Inline, withfallback=false, parent=0x81d9f40, 
    name=0xb73025c0 "unnamed", args=@0x81da0e0)
    at /root/kdelibs/kdelibs-3.5.6/./kutils/kcmoduleloader.cpp:156
#65 0xb7bfe3c5 in KCModuleProxy::realModule (this=0x81d9f40)
    at /root/kdelibs/kdelibs-3.5.6/./kutils/kcmoduleproxy.cpp:186
#66 0xb7bfefe2 in KCModuleProxy::buttons (this=0x81d9f40)
    at /root/kdelibs/kdelibs-3.5.6/./kutils/kcmoduleproxy.cpp:603
#67 0x0805cb6d in QValueListPrivate<QString>::~QValueListPrivate ()
#68 0x0805f7d0 in endl ()
#69 0x080600ff in endl ()
#70 0xb6f21957 in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#71 0x08061eb2 in KAboutApplication::~KAboutApplication ()
#72 0x08061f11 in KAboutApplication::~KAboutApplication ()
#73 0xb6f2192b in QObject::activate_signal () from /usr/lib/libqt-mt.so.3
#74 0xb72e3f4b in QIconView::clicked () from /usr/lib/libqt-mt.so.3
#75 0xb710f293 in QIconView::contentsMouseReleaseEvent ()
   from /usr/lib/libqt-mt.so.3
#76 0xb7d423fe in KIconView::contentsMouseReleaseEvent (this=0x8192cc8, 
    e=0xbfc968bc) at /root/kdelibs/kdelibs-3.5.6/./kdeui/kiconview.cpp:334
#77 0xb7056fcf in QScrollView::viewportMouseReleaseEvent ()
   from /usr/lib/libqt-mt.so.3
#78 0xb7058566 in QScrollView::eventFilter () from /usr/lib/libqt-mt.so.3
#79 0xb7109fa0 in QIconView::eventFilter () from /usr/lib/libqt-mt.so.3
#80 0xb6f20f04 in QObject::activate_filters () from /usr/lib/libqt-mt.so.3
#81 0xb6f20f82 in QObject::event () from /usr/lib/libqt-mt.so.3
#82 0xb6f5865b in QWidget::event () from /usr/lib/libqt-mt.so.3
#83 0xb6eb8b88 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#84 0xb6ebad46 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#85 0xb78cbc82 in KApplication::notify (this=0xbfc97368, receiver=0x81936b0, 
    event=0xbfc96dd0)
    at /root/kdelibs/kdelibs-3.5.6/./kdecore/kapplication.cpp:550
#86 0xb6e4b3fd in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#87 0xb6e4a062 in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#88 0xb6e4814c in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#89 0xb6e5f320 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#90 0xb6ed325e in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#91 0xb6ed306e in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#92 0xb6eba731 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#93 0x0805e8e9 in endl ()
#94 0xb798a8cc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#95 0x08057fe1 in ?? ()

Hope this helps, Bob