Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.30.5-43.fc11.x86_64 x86_64
Distribution: "Fedora release 11 (Leonidas)"

What I was doing when the application crashed:
When I open the menu to add a Plasma and I click on "Download a Plasma" (french version of KDE), the desktop "re-start".

 -- Backtrace:
Application: Espace de travail Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f152a705820 (LWP 3692))]

Thread 2 (Thread 0x7f1513a17910 (LWP 3695)):
#0  0x0000003365e0b2f9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x000000336ca5adfb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/libQtCore.so.4
#2  0x000000336d0818e4 in ?? () from /usr/lib64/libQtNetwork.so.4
#3  0x000000336ca59d45 in ?? () from /usr/lib64/libQtCore.so.4
#4  0x0000003365e0686a in start_thread () from /lib64/libpthread.so.0
#5  0x00000033652de3bd in clone () from /lib64/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f152a705820 (LWP 3692)):
[KCrash Handler]
#5  0x0000003377456b62 in KNS::Engine::downloadDialog() () from /usr/lib64/libknewstuff2.so.4
#6  0x000000337791dd12 in ?? () from /usr/lib64/libplasma.so.3
#7  0x000000336ea5a3f7 in ?? () from /usr/lib64/libkdeinit4_plasma-desktop.so
#8  0x000000336ea5d2d1 in ?? () from /usr/lib64/libkdeinit4_plasma-desktop.so
#9  0x000000336cb547dc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#10 0x000000336cb572b5 in QSignalMapper::mapped(QString const&) () from /usr/lib64/libQtCore.so.4
#11 0x000000336cb584ea in QSignalMapper::map(QObject*) () from /usr/lib64/libQtCore.so.4
#12 0x000000336cb58710 in QSignalMapper::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libQtCore.so.4
#13 0x000000336cb547dc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#14 0x000000336df89857 in QAction::triggered(bool) () from /usr/lib64/libQtGui.so.4
#15 0x000000336df8acbf in QAction::activate(QAction::ActionEvent) () from /usr/lib64/libQtGui.so.4
#16 0x000000336e373215 in ?? () from /usr/lib64/libQtGui.so.4
#17 0x000000336e3790fa in ?? () from /usr/lib64/libQtGui.so.4
#18 0x0000003373ae2c7e in KMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib64/libkdeui.so.5
#19 0x000000336dfddd88 in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#20 0x000000336e37b863 in QMenu::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#21 0x000000336df8f69c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#22 0x000000336df96741 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#23 0x0000003373a11296 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#24 0x000000336cb3f59c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#25 0x000000336df96030 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib64/libQtGui.so.4
#26 0x000000336dffbe6e in ?? () from /usr/lib64/libQtGui.so.4
#27 0x000000336dffab08 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#28 0x000000336e0227dc in ?? () from /usr/lib64/libQtGui.so.4
#29 0x0000003366e37abe in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#30 0x0000003366e3b278 in ?? () from /lib64/libglib-2.0.so.0
#31 0x0000003366e3b3a0 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#32 0x000000336cb67936 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#33 0x000000336e021f8e in ?? () from /usr/lib64/libQtGui.so.4
#34 0x000000336cb3ded2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#35 0x000000336cb3e2a4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#36 0x000000336e37b6f5 in QMenu::exec(QPoint const&, QAction*) () from /usr/lib64/libQtGui.so.4
#37 0x000000336e38664b in ?? () from /usr/lib64/libQtGui.so.4
#38 0x000000336e387c02 in QPushButton::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libQtGui.so.4
#39 0x0000003373aee925 in KPushButton::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libkdeui.so.5
#40 0x000000336cb547dc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#41 0x000000336e2ee8ae in ?? () from /usr/lib64/libQtGui.so.4
#42 0x000000336e2eea83 in QAbstractButton::mousePressEvent(QMouseEvent*) () from /usr/lib64/libQtGui.so.4
#43 0x000000336dfddd6e in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#44 0x000000336df8f69c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#45 0x000000336df96741 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#46 0x0000003373a11296 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#47 0x000000336cb3f59c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#48 0x000000336df96030 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib64/libQtGui.so.4
#49 0x000000336dffba4e in ?? () from /usr/lib64/libQtGui.so.4
#50 0x000000336dffab08 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#51 0x000000336e0227dc in ?? () from /usr/lib64/libQtGui.so.4
#52 0x0000003366e37abe in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#53 0x0000003366e3b278 in ?? () from /lib64/libglib-2.0.so.0
#54 0x0000003366e3b3a0 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#55 0x000000336cb67936 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#56 0x000000336e021f8e in ?? () from /usr/lib64/libQtGui.so.4
#57 0x000000336cb3ded2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#58 0x000000336cb3e2a4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#59 0x000000336cb40439 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#60 0x000000336ea3aeaf in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#61 0x000000336521ea2d in __libc_start_main () from /lib64/libc.so.6
#62 0x0000000000400779 in _start ()

Reported using DrKonqi