Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.5.3
Operating System: Linux 2.6.31.6-166.fc12.i686 i686

What I was doing when the application crashed:
 

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb77497d0 (LWP 3245))]

Thread 2 (Thread 0xabf43b70 (LWP 3246)):
#0  0x00b95416 in __kernel_vsyscall ()
#1  0x00999c45 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0x068ace5f in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0x06beae42 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0x068abde3 in ?? () from /usr/lib/libQtCore.so.4
#5  0x00995ab5 in start_thread () from /lib/libpthread.so.0
#6  0x008ec83e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb77497d0 (LWP 3245)):
[KCrash Handler]
#6  0x0717e14a in Plasma::ExtenderItem::group() const () from /usr/lib/libplasma.so.3
#7  0x0717c6b6 in Plasma::ExtenderGroup::items() const () from /usr/lib/libplasma.so.3
#8  0x01072505 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib/kde4/plasma_applet_systemtray.so
#9  0x01073002 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib/kde4/plasma_applet_systemtray.so
#10 0x069b2c0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x069b3843 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x01073904 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x01074dff in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib/kde4/plasma_applet_systemtray.so
#14 0x069b2c0c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#15 0x069b3059 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x0107611c in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib/kde4/plasma_applet_systemtray.so
#17 0x010767bc in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib/kde4/plasma_applet_systemtray.so
#18 0x01085585 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib/kde4/plasma_applet_systemtray.so
#19 0x069aba26 in qDeleteInEventHandler(QObject*) () from /usr/lib/libQtCore.so.4
#20 0x069acfcb in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#21 0x051fbb24 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x05203281 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x05c8b02b in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#24 0x0699cd73 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#25 0x0699d972 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#26 0x0699db2e in QCoreApplication::sendPostedEvents(QObject*, int) () from /usr/lib/libQtCore.so.4
#27 0x069c7f40 in ?? () from /usr/lib/libQtCore.so.4
#28 0x002be128 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#29 0x002c1a58 in ?? () from /lib/libglib-2.0.so.0
#30 0x002c1b84 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#31 0x069c7b6d in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#32 0x0529b356 in ?? () from /usr/lib/libQtGui.so.4
#33 0x0699b2aa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x0699b70a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#35 0x0699dbf7 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#36 0x051fb9a8 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#37 0x005295e7 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#38 0x080486fc in _start ()

Reported using DrKonqi