Version:            (using KDE KDE 3.5.7)
Installed from:    Ubuntu Packages

I enabled the newexchange plugin and hit bug 101230 where the plugin failed to log into the exchange server. I cleared the diaglog boxes, which were popping up very rapidly - it almost seems like korganizer keeps trying to login very fast if a login fails. When I removed the newexchange plugin korganizer crashed with the following backtrace:

Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1242388784 (LWP 6906)]
[KCrash handler]
#6  0xb7124689 in QString::operator= (this=0xbff707dc, s=@0x21)
    at tools/qstring.cpp:1593
#7  0xb73defa6 in KURL::operator= (this=0xbff707dc, _u=@0x21)
    at /root/kdelibs/kdelibs-3.5.7/./kdecore/kurl.cpp:1069
#8  0xb741f3b7 in KURL (this=0xbff707dc, _u=@0x21)
    at /root/kdelibs/kdelibs-3.5.7/./kdecore/kurl.cpp:485
#9  0xb56a2393 in KPIM::ExchangeAccount::calendarURL (this=0x8440f10)
    at /root/kdepim/new/kdepim-3.5.7/./libkpimexchange/core/exchangeaccount.cpp:147
#10 0xb56a5a26 in KPIM::ExchangeDownload::download (this=0x83fdbe8, 
    calendar=0x8433468, start=@0xbff70958, end=@0xbff70954, showProgress=true)
    at /root/kdepim/new/kdepim-3.5.7/./libkpimexchange/core/exchangedownload.cpp:109
#11 0xb56a5c2c in KPIM::ExchangeClient::download (this=0x8440ea8, 
    calendar=0x8433468, start=@0xbff70958, end=@0xbff70954, showProgress=true)
    at /root/kdepim/new/kdepim-3.5.7/./libkpimexchange/core/exchangeclient.cpp:132
#12 0xb56a5cc1 in KPIM::ExchangeClient::downloadSynchronous (this=0x8440ea8, 
    calendar=0x8433468, start=@0xbff70958, end=@0xbff70954, showProgress=true)
    at /root/kdepim/new/kdepim-3.5.7/./libkpimexchange/core/exchangeclient.cpp:223
#13 0xb56c6bd6 in KCal::ResourceExchange::rawEventsForDate (this=0x844c558, 
    qd=@0x81c0d90, sortField=KCal::EventSortUnsorted, 
    sortDirection=KCal::SortDirectionAscending)
    at /root/kdepim/new/kdepim-3.5.7/./kresources/exchange/resourceexchange.cpp:484
#14 0xb7a48665 in KCal::CalendarResources::rawEventsForDate (this=0x8268bf0, 
    date=@0x81c0d90, sortField=KCal::EventSortUnsorted, 
    sortDirection=KCal::SortDirectionAscending)
    at /root/kdepim/new/kdepim-3.5.7/./libkcal/calendarresources.cpp:461
#15 0xb7a39a94 in KCal::Calendar::events (this=0x8268bf0, date=@0x81c0d90, 
    sortField=KCal::EventSortUnsorted, 
    sortDirection=KCal::SortDirectionAscending)
    at /root/kdepim/new/kdepim-3.5.7/./libkcal/calendar.cpp:255
#16 0xb7e83da7 in KODayMatrix::updateEvents (this=0x8250758)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/kodaymatrix.cpp:276
#17 0xb7e83f06 in KODayMatrix::updateView (this=0x8250758, actdate=@0x82507f0)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/kodaymatrix.cpp:254
#18 0xb7e841b7 in KODayMatrix::updateView (this=0x8250758)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/kodaymatrix.cpp:213
#19 0xb7e84268 in KDateNavigator::updateDayMatrix (this=0x827ecb0)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/kdatenavigator.cpp:201
#20 0xb7e843b2 in KDateNavigator::updateView (this=0x827ecb0)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/kdatenavigator.cpp:210
#21 0xb7e843fa in DateNavigatorContainer::updateView (this=0x82880d8)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/datenavigatorcontainer.cpp:123
#22 0xb7e84485 in CalendarView::updateView (this=0x812a780, start=@0x80aaec8, 
    end=@0x8363a40)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/calendarview.cpp:798
#23 0xb7e8450c in CalendarView::updateView (this=0x812a780)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/calendarview.cpp:806
#24 0xb7ebb822 in CalendarView::qt_invoke (this=0x812a780, _id=113, 
    _o=0xbff70c7c) at ./calendarview.moc:1025
#25 0xb6e099b8 in QObject::activate_signal (this=0x8252040, clist=0x81fbdf8, 
    o=0xbff70c7c) at kernel/qobject.cpp:2380
#26 0xb6e0a330 in QObject::activate_signal (this=0x8252040, signal=2)
    at kernel/qobject.cpp:2325
#27 0xb7dfd299 in ResourceView::resourcesChanged (this=0x8252040)
    at ./resourceview.moc:146
#28 0xb7e7abce in ResourceView::addResourceItem (this=0x8252040, 
    resource=0x844c558)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/resourceview.cpp:372
#29 0xb7ec0e55 in ResourceView::qt_invoke (this=0x8252040, _id=46, 
    _o=0xbff70d94) at ./resourceview.moc:152
#30 0xb6e099b8 in QObject::activate_signal (this=0x8268bf0, clist=0x8213a08, 
    o=0xbff70d94) at kernel/qobject.cpp:2380
#31 0xb7a14901 in KCal::CalendarResources::signalResourceAdded (
    this=0x8268bf0, t0=0x844c558) at ./calendarresources.moc:139
#32 0xb7a37c44 in KCal::CalendarResources::resourceAdded (this=0x8268bf0, 
    resource=0x844c558)
    at /root/kdepim/new/kdepim-3.5.7/./libkcal/calendarresources.cpp:648
#33 0xb7e7a6cf in ResourceView::addResource (this=0x8252040)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/resourceview.cpp:336
#34 0xb7ec0e80 in ResourceView::qt_invoke (this=0x8252040, _id=48, 
    _o=0xbff70f8c) at ./resourceview.moc:154
#35 0xb6e0988b in QObject::activate_signal (this=0x81d9dd8, clist=0x8214408, 
    o=0xbff70f8c) at kernel/qobject.cpp:2356
#36 0xb6e0a330 in QObject::activate_signal (this=0x81d9dd8, signal=4)
    at kernel/qobject.cpp:2325
#37 0xb719eafb in QButton::clicked (this=0x81d9dd8)
    at .moc/debug-shared-mt/moc_qbutton.cpp:152
#38 0xb6ea7f30 in QButton::mouseReleaseEvent (this=0x81d9dd8, e=0xbff71400)
    at widgets/qbutton.cpp:836
#39 0xb6e4065d in QWidget::event (this=0x81d9dd8, e=0xbff71400)
    at kernel/qwidget.cpp:4702
#40 0xb6da0a60 in QApplication::internalNotify (this=0xbff71984, 
    receiver=0x81d9dd8, e=0xbff71400) at kernel/qapplication.cpp:2635
#41 0xb6da2c1e in QApplication::notify (this=0xbff71984, receiver=0x81d9dd8, 
    e=0xbff71400) at kernel/qapplication.cpp:2421
#42 0xb74dcc32 in KApplication::notify (this=0xbff71984, receiver=0x81d9dd8, 
    event=0xbff71400)
    at /root/kdelibs/kdelibs-3.5.7/./kdecore/kapplication.cpp:550
#43 0xb6d3325d in QApplication::sendSpontaneousEvent (receiver=0x81d9dd8, 
    event=0xbff71400) at kernel/qapplication.h:523
#44 0xb6d31ec2 in QETWidget::translateMouseEvent (this=0x81d9dd8, 
    event=0xbff71858) at kernel/qapplication_x11.cpp:4303
#45 0xb6d2ffac in QApplication::x11ProcessEvent (this=0xbff71984, 
    event=0xbff71858) at kernel/qapplication_x11.cpp:3480
#46 0xb6d47180 in QEventLoop::processEvents (this=0x808faf0, flags=4)
    at kernel/qeventloop_x11.cpp:192
#47 0xb6dbb136 in QEventLoop::enterLoop (this=0x808faf0)
    at kernel/qeventloop.cpp:198
#48 0xb6dbaf46 in QEventLoop::exec (this=0x808faf0)
    at kernel/qeventloop.cpp:145
#49 0xb6da2609 in QApplication::exec (this=0xbff71984)
    at kernel/qapplication.cpp:2758
#50 0x08051fc4 in main (argc=138102240, argv=0x83b3be8)
    at /root/kdepim/new/kdepim-3.5.7/./korganizer/main.cpp:58
#51 0xb7aeaebc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#52 0x080505b1 in _start ()