Application that crashed: konqueror
Version of the application: 4.3.00 (KDE 4.3.0)
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.30.5-43.fc11.i586 i686
Distribution: "Fedora release 11 (Leonidas)"

What I was doing when the application crashed:
Konqueror crashes when there is an extraction in progress and I click from folder to folder very fast. I can reproduce this behaviour almost every time.

 -- Backtrace:
Application: Konqueror (konqueror), signal: Segmentation fault
[KCrash Handler]
#6  0x0056ddf9 in QUrl::QUrl(QUrl const&) () from /usr/lib/libQtCore.so.4
#7  0x0775da49 in KUrl::KUrl(KUrl const&) () from /usr/lib/libkdecore.so.5
#8  0x02ab6b0e in KFileItem::url() const () from /usr/lib/libkio.so.5
#9  0x02aa466f in KDirModel::indexForItem(KFileItem const&) const () from /usr/lib/libkio.so.5
#10 0x01b84dd6 in KFilePreviewGenerator::Private::orderItems(KFileItemList&) () from /usr/lib/libkfile.so.4
#11 0x01b88a4d in KFilePreviewGenerator::Private::updateIcons(KFileItemList const&) () from /usr/lib/libkfile.so.4
#12 0x01b88c92 in KFilePreviewGenerator::Private::delayedIconUpdate() () from /usr/lib/libkfile.so.4
#13 0x01b89d06 in KFilePreviewGenerator::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libkfile.so.4
#14 0x005cf853 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#15 0x005d04b2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x00609b47 in QTimer::timeout() () from /usr/lib/libQtCore.so.4
#17 0x005d4f8e in QTimer::timerEvent(QTimerEvent*) () from /usr/lib/libQtCore.so.4
#18 0x005c996f in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x02127974 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x0212f0e9 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x07b36a7a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#22 0x005b9b0b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#23 0x005e6d7e in ?? () from /usr/lib/libQtCore.so.4
#24 0x005e46a0 in ?? () from /usr/lib/libQtCore.so.4
#25 0x00a5fcf8 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0x00a63370 in ?? () from /lib/libglib-2.0.so.0
#27 0x00a634a3 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#28 0x005e45ec in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#29 0x021c6cb5 in ?? () from /usr/lib/libQtGui.so.4
#30 0x005b80d9 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#31 0x005b852a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#32 0x005ba9af in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#33 0x021277f7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#34 0x02d5a121 in kdemain () from /usr/lib/libkdeinit4_konqueror.so
#35 0x080486db in _start ()

Reported using DrKonqi