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

I started up my machine and saw the below crash when everything opened.  It has never done this before.  What is particularly odd is that Konqueror wasn't about to open any web pages at all.  There are four tabs open that point to directories, not files.

Here is the backtrace

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1232562480 (LWP 5348)]
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[KCrash handler]
#6  0xb7128b12 in QGList::findRef () from /usr/lib/libqt-mt.so.3
#7  0xb6e32648 in QPtrList<QObject>::findNextRef ()
   from /usr/lib/libqt-mt.so.3
#8  0xb6e2e5bb in ?? () from /usr/lib/libqt-mt.so.3
#9  0x080c7a80 in ?? ()
#10 0x080d2078 in ?? ()
#11 0xbff47300 in ?? ()
#12 0x080d2078 in ?? ()
#13 0x080c7a80 in ?? ()
#14 0xb72f5ab0 in ?? () from /usr/lib/libqt-mt.so.3
#15 0xbff47328 in ?? ()
#16 0xb6e3250b in QPtrListIterator<QConnection>::operator++ ()
   from /usr/lib/libqt-mt.so.3
#17 0xb6e3160a in QObject::~QObject () from /usr/lib/libqt-mt.so.3
#18 0x0805be23 in NSPluginStreamBase::~NSPluginStreamBase ()
#19 0x0805be83 in NSPluginStream::~NSPluginStream ()
#20 0xb6e2cf54 in QObject::event () from /usr/lib/libqt-mt.so.3
#21 0xb6dc4a60 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#22 0xb6dc688f in QApplication::notify () from /usr/lib/libqt-mt.so.3
#23 0xb7501ce2 in KApplication::notify () from /usr/lib/libkdecore.so.4
#24 0xb6d571e9 in QApplication::sendEvent () from /usr/lib/libqt-mt.so.3
#25 0xb6dc5a98 in QApplication::sendPostedEvents ()
   from /usr/lib/libqt-mt.so.3
#26 0xb6dc5ba0 in QApplication::sendPostedEvents ()
   from /usr/lib/libqt-mt.so.3
#27 0x08055621 in QXtEventLoop::processEvents ()
#28 0xb6ddf136 in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#29 0xb6ddef46 in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#30 0xb6dc6609 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#31 0x08059c45 in main ()