Application that crashed: nspluginviewer
Version of the application: 
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-17-generic-pae i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
nspluginviewer crash on several websites, possibly flash caused.

 -- Backtrace:
Application: nspluginviewer (nspluginviewer), signal: Segmentation fault
[KCrash Handler]
#6  0x00000000 in ?? ()
#7  0xb4c83434 in nsPluginInstance::getCurrentPageURL() const () from /usr/lib/firefox/plugins/flashplugin-alternative.so
#8  0xb4c83c6c in nsPluginInstance::startProc(unsigned long) () from /usr/lib/firefox/plugins/flashplugin-alternative.so
#9  0xb4c8481c in nsPluginInstance::NewStream(char*, _NPStream*, unsigned char, unsigned short*) () from /usr/lib/firefox/plugins/flashplugin-alternative.so
#10 0xb4c8569b in NPP_NewStream () from /usr/lib/firefox/plugins/flashplugin-alternative.so
#11 0x0804fc9d in ?? ()
#12 0x08058360 in ?? ()
#13 0x08058917 in ?? ()
#14 0x080589e1 in ?? ()
#15 0x08058c6b in ?? ()
#16 0xb6b75263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#17 0xb6b75ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#18 0xb72ef7a9 in KIO::TransferJob::data(KIO::Job*, QByteArray const&) () from /usr/lib/libkio.so.5
#19 0xb72efff2 in KIO::TransferJob::slotData(QByteArray const&) () from /usr/lib/libkio.so.5
#20 0xb72f58c5 in KIO::TransferJob::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#21 0xb6b75263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#22 0xb6b75ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#23 0xb73c1673 in KIO::SlaveInterface::data(QByteArray const&) () from /usr/lib/libkio.so.5
#24 0xb73c55d7 in KIO::SlaveInterface::dispatch(int, QByteArray const&) () from /usr/lib/libkio.so.5
#25 0xb73c1a13 in KIO::SlaveInterface::dispatch() () from /usr/lib/libkio.so.5
#26 0xb73b3aea in KIO::Slave::gotInput() () from /usr/lib/libkio.so.5
#27 0xb73b5ee3 in KIO::Slave::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#28 0xb6b75263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#29 0xb6b75ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#30 0xb72bdf97 in KIO::Connection::readyRead() () from /usr/lib/libkio.so.5
#31 0xb72bfd5e in ?? () from /usr/lib/libkio.so.5
#32 0xb72bfe8e in KIO::Connection::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkio.so.5
#33 0xb6b6df0b in QMetaCallEvent::placeMetaCall(QObject*) () from /usr/lib/libQtCore.so.4
#34 0xb6b6f5fe in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#35 0xb61a2f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#36 0xb61aa67c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#37 0xb706ebfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#38 0xb6b5f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#39 0xb6b602b2 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#40 0xb6b6047d in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#41 0xb6b8a3ff in ?? () from /usr/lib/libQtCore.so.4
#42 0xb74eae88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#43 0xb74ee730 in ?? () from /lib/libglib-2.0.so.0
#44 0xb74ee863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#45 0xb6b8a02c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#46 0xb6243be5 in ?? () from /usr/lib/libQtGui.so.4
#47 0xb6b5dc79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#48 0xb6b5e0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#49 0xb6b6053f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#50 0xb61a2dd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#51 0x0805c7c0 in ?? ()
#52 0xb5e61b56 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#53 0x0804e591 in _start ()

Reported using DrKonqi