Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.5-127.fc12.i686.PAE i686

What I was doing when the application crashed:
Plasma Desktop crashed when I changed wallpaper. The previous wallpaper was a low resolutin one(800x533). The new one was a higher resolution one(1600x1200). 

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb77ce7a0 (LWP 2167))]

Thread 2 (Thread 0xab70db70 (LWP 2188)):
#0  0x007bc424 in __kernel_vsyscall ()
#1  0x00e57c45 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x0137ae5f in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0x002d9262 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0x01379de3 in ?? () from /usr/lib/libQtCore.so.4
#5  0x00e53ab5 in start_thread () from /lib/libpthread.so.0
#6  0x07cd983e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb77ce7a0 (LWP 2167)):
[KCrash Handler]
#6  0x00000039 in ?? ()
#7  0x00b25421 in KNS::Engine::downloadDialogModal(QWidget*) () from /usr/lib/libknewstuff2.so.4
#8  0x077a3fe6 in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#9  0x077a7113 in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#10 0x01480bfc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x01481049 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x02b93312 in QAbstractButton::clicked(bool) () from /usr/lib/libQtGui.so.4
#13 0x028b9b9a in ?? () from /usr/lib/libQtGui.so.4
#14 0x028bb7e5 in ?? () from /usr/lib/libQtGui.so.4
#15 0x028bba81 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#16 0x0255bd6f in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x028b9a3f in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#18 0x029640be in QPushButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x02506b24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x0250ea90 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x0110bb2b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#22 0x0146ad63 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#23 0x0250db97 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#24 0x0257c4b8 in ?? () from /usr/lib/libQtGui.so.4
#25 0x0257b91d in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#26 0x025a6c92 in ?? () from /usr/lib/libQtGui.so.4
#27 0x015a5118 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#28 0x015a8a48 in ?? () from /lib/libglib-2.0.so.0
#29 0x015a8b74 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#30 0x01495b5d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#31 0x025a6356 in ?? () from /usr/lib/libQtGui.so.4
#32 0x0146929a in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#33 0x014696fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x00b25085 in ?? () from /usr/lib/libknewstuff2.so.4
#35 0x00b254ad in KNS::Engine::downloadDialogModal(QWidget*) () from /usr/lib/libknewstuff2.so.4
#36 0x077a3fe6 in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#37 0x077a7113 in ?? () from /usr/lib/kde4/plasma_wallpaper_image.so
#38 0x01480bfc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#39 0x01481049 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/libQtCore.so.4
#40 0x02b93312 in QAbstractButton::clicked(bool) () from /usr/lib/libQtGui.so.4
#41 0x028b9b9a in ?? () from /usr/lib/libQtGui.so.4
#42 0x028bb7e5 in ?? () from /usr/lib/libQtGui.so.4
#43 0x028bba81 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#44 0x0255bd6f in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#45 0x028b9a3f in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#46 0x029640be in QPushButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#47 0x02506b24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#48 0x0250ea90 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#49 0x0110bb2b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#50 0x0146ad63 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#51 0x0250db97 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#52 0x0257c4b8 in ?? () from /usr/lib/libQtGui.so.4
#53 0x0257b91d in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#54 0x025a6c92 in ?? () from /usr/lib/libQtGui.so.4
#55 0x015a5118 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#56 0x015a8a48 in ?? () from /lib/libglib-2.0.so.0
#57 0x015a8b74 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#58 0x01495b5d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#59 0x025a6356 in ?? () from /usr/lib/libQtGui.so.4
#60 0x0146929a in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#61 0x014696fa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#62 0x0146bbe7 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#63 0x025069a8 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#64 0x00dd354a in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#65 0x080486fc in _start ()

Reported using DrKonqi