Application that crashed: konqueror
Version of the application: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.1
Operating System: Linux 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
What was i doing:
Two opened tabs one kde home page and other gmail
On both preview in WebKit option was chosen.
On gmail tab I changed browser identification to: Safary 3.2 on Max OSX
My CPU usage was very high both cores about 80%.
Top CPU usage process was nspluginviewer.

When i closed gmail tab Konqueror crashed.

 -- Backtrace:
Application: Konqueror (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  0xb53d6efd in ?? () from /usr/lib/libQtWebKit.so.4
#7  0xb53d5011 in ?? () from /usr/lib/libQtWebKit.so.4
#8  0xb5295765 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#9  0xb535eb72 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#10 0xb5053149 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#11 0xb50106fe in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#12 0xb503c663 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#13 0xb515c98e in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#14 0xb50106eb in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#15 0xb503c663 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#16 0xb50106eb in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#17 0xb503c663 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#18 0xb50106eb in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#19 0xb501f3fb in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#20 0xb523bd06 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#21 0xb52458c6 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#22 0xb51d228a in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#23 0xb51d23a5 in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#24 0xb51d220d in ctiVMThrowTrampoline () from /usr/lib/libQtWebKit.so.4
#25 0xb53ef288 in QWebPage::~QWebPage () from /usr/lib/libQtWebKit.so.4
#26 0xaefee028 in KWebPage::~KWebPage () from /usr/lib/libkdewebkit.so.1
#27 0xaf0f74bd in ?? () from /usr/lib/libwebkitkde.so.1
#28 0xb7e88bef in QObjectPrivate::deleteChildren () from /usr/lib/libQtCore.so.4
#29 0xb696711b in QWidget::~QWidget () from /usr/lib/libQtGui.so.4
#30 0xb7ae20e9 in KParts::Part::~Part () from /usr/lib/libkparts.so.4
#31 0xb7ae244a in KParts::ReadOnlyPart::~ReadOnlyPart () from /usr/lib/libkparts.so.4
#32 0xaf0f7dab in WebKitPart::~WebKitPart () from /usr/lib/libwebkitkde.so.1
#33 0xb49a8f08 in ?? () from /usr/lib/libkdeinit4_konqueror.so
#34 0xb49afc3c in ?? () from /usr/lib/libkdeinit4_konqueror.so
#35 0xb49e2735 in ?? () from /usr/lib/libkdeinit4_konqueror.so
#36 0xb4a0a5cc in ?? () from /usr/lib/libkdeinit4_konqueror.so
#37 0xb7e8fa58 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#38 0xb7e906e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#39 0xb7e94e57 in ?? () from /usr/lib/libQtCore.so.4
#40 0xb7e94f7c in ?? () from /usr/lib/libQtCore.so.4
#41 0xb7e89f0f in QObject::event () from /usr/lib/libQtCore.so.4
#42 0xb6914bcc in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#43 0xb691cede in QApplication::notify () from /usr/lib/libQtGui.so.4
#44 0xb744e3dd in KApplication::notify () from /usr/lib/libkdeui.so.5
#45 0xb7e797ab in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#46 0xb7ea8b31 in ?? () from /usr/lib/libQtCore.so.4
#47 0xb7ea5280 in ?? () from /usr/lib/libQtCore.so.4
#48 0xb64c7b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#49 0xb64cb0eb in ?? () from /usr/lib/libglib-2.0.so.0
#50 0xb64cb268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#51 0xb7ea51d8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#52 0xb69b6765 in ?? () from /usr/lib/libQtGui.so.4
#53 0xb7e77dda in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#54 0xb7e7821a in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#55 0xb7e7a6c9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#56 0xb6914a47 in QApplication::exec () from /usr/lib/libQtGui.so.4
#57 0xb4a3b0e8 in kdemain () from /usr/lib/libkdeinit4_konqueror.so
#58 0x0804e1c0 in _start ()

Reported using DrKonqi