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 2.6.31-20-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
google search with "anime wallpaper"
-> result displayed. click www.animewallpaper.com site
-> click any item of menu for example "anime" or "game"
-> konqueror crash message appeared.

 -- Backtrace:
Application: nspluginviewer (nspluginviewer), signal: Segmentation fault
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0x7ff3574b8750 (LWP 14867))]

Thread 2 (Thread 0x7ff34c30a910 (LWP 14869)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:220
#1  0x00007ff355068462 in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0xdcee30, time=30000) at thread/qwaitcondition_unix.cpp:85
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0xdcee30, time=30000) at thread/qwaitcondition_unix.cpp:159
#3  0x00007ff35505e4f2 in QThreadPoolThread::run (this=<value optimized out>) at concurrent/qthreadpool.cpp:140
#4  0x00007ff355067445 in QThreadPrivate::start (arg=0xdcefe0) at thread/qthread_unix.cpp:188
#5  0x00007ff350b78a04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007ff353eb580d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ff3574b8750 (LWP 14867)):
[KCrash Handler]
#5  0x0000000000000000 in ?? ()
#6  0x00007ff34c931424 in nsPluginInstance::getCurrentPageURL() const () from /usr/lib/firefox/plugins/flashplugin-alternative.so
#7  0x00007ff34c931adc in nsPluginInstance::startProc(unsigned long) () from /usr/lib/firefox/plugins/flashplugin-alternative.so
#8  0x00007ff34c9325c1 in nsPluginInstance::NewStream(char*, _NPStream*, unsigned char, unsigned short*) () from /usr/lib/firefox/plugins/flashplugin-alternative.so
#9  0x0000000000409894 in NSPluginInstance::NPNewStream (this=<value optimized out>, type=0x7ff34c933ddf "", stream=0x0, seekable=116 't', stype=0x4)
    at ../../../../apps/nsplugins/viewer/nsplugin.cpp:1068
#10 0x0000000000411983 in NSPluginStreamBase::inform (this=0xec89b0) at ../../../../apps/nsplugins/viewer/nsplugin.cpp:1533
#11 0x0000000000411e99 in NSPluginStreamBase::pump (this=0x7ff34c933b35) at ../../../../apps/nsplugins/viewer/nsplugin.cpp:1649
#12 0x0000000000411f34 in NSPluginStream::data (this=0xec89b0, data=<value optimized out>) at ../../../../apps/nsplugins/viewer/nsplugin.cpp:1870
#13 0x000000000041217f in NSPluginStream::qt_metacall (this=0xec89b0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff78a21700) at ./nsplugin.moc:137
#14 0x00007ff355162ddc in QMetaObject::activate (sender=0xeb6e80, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x6873616e672d6b74) at kernel/qobject.cpp:3113
#15 0x00007ff355fde2d4 in KIO::TransferJob::data (this=0x7ff34c933b35, _t1=0xeb6e80, _t2=<value optimized out>) at ./jobclasses.moc:364
#16 0x00007ff355fe3b86 in KIO::TransferJob::qt_metacall (this=0xeb6e80, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff78a21840) at ./jobclasses.moc:344
#17 0x00007ff355162ddc in QMetaObject::activate (sender=0xec79d0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x6873616e672d6b74) at kernel/qobject.cpp:3113
#18 0x00007ff3560a2072 in KIO::SlaveInterface::data (this=0x7ff34c933b35, _t1=<value optimized out>) at ./slaveinterface.moc:140
#19 0x00007ff3560a5bb8 in KIO::SlaveInterface::dispatch (this=0xec79d0, _cmd=100, rawdata=...) at ../../kio/kio/slaveinterface.cpp:163
#20 0x00007ff3560a2333 in KIO::SlaveInterface::dispatch (this=0xec79d0) at ../../kio/kio/slaveinterface.cpp:91
#21 0x00007ff35609514d in KIO::Slave::gotInput (this=0xec79d0) at ../../kio/kio/slave.cpp:322
#22 0x00007ff35609726c in KIO::Slave::qt_metacall (this=0xec79d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff78a21bd0) at ./slave.moc:76
#23 0x00007ff355162ddc in QMetaObject::activate (sender=0xec7960, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x6873616e672d6b74) at kernel/qobject.cpp:3113
#24 0x00007ff355fb1f57 in KIO::ConnectionPrivate::dequeue (this=0xec76f0) at ../../kio/kio/connection.cpp:82
#25 0x00007ff355fb207d in KIO::Connection::qt_metacall (this=0xec7960, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0xe45930) at ./connection.moc:73
#26 0x00007ff35515d0f9 in QObject::event (this=0xec7960, e=0xee30b0) at kernel/qobject.cpp:1111
#27 0x00007ff3545f5efc in QApplicationPrivate::notify_helper (this=0xd81760, receiver=0xec7960, e=0xee30b0) at kernel/qapplication.cpp:4056
#28 0x00007ff3545fd1ce in QApplication::notify (this=0x7fff78a22610, receiver=0xec7960, e=0xee30b0) at kernel/qapplication.cpp:4021
#29 0x00007ff355af0ab6 in KApplication::notify (this=0x7fff78a22610, receiver=0xec7960, event=0xee30b0) at ../../kdeui/kernel/kapplication.cpp:302
#30 0x00007ff35514dc2c in QCoreApplication::notifyInternal (this=0x7fff78a22610, receiver=0xec7960, event=0xee30b0) at kernel/qcoreapplication.cpp:610
#31 0x00007ff35514e80a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0xd55080) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#32 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0xd55080) at kernel/qcoreapplication.cpp:1247
#33 0x00007ff355176533 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#34 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#35 0x00007ff3563f5bce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#36 0x00007ff3563f9598 in ?? () from /lib/libglib-2.0.so.0
#37 0x00007ff3563f96c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#38 0x00007ff3551761a6 in QEventDispatcherGlib::processEvents (this=0xd54cb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#39 0x00007ff35468a4be in QGuiEventDispatcherGlib::processEvents (this=0x7ff34c933b35, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#40 0x00007ff35514c532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#41 0x00007ff35514c904 in QEventLoop::exec (this=0x7fff78a224d0, flags=) at kernel/qeventloop.cpp:201
#42 0x00007ff35514eab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#43 0x000000000041583c in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../../apps/nsplugins/viewer/viewer.cpp:144
The current source language is "auto; currently asm".
The current source language is "auto; currently c".

Reported using DrKonqi