Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1) "release 6"
Qt Version: 4.5.3
Operating System: Linux 2.6.31.8-0.1-xen x86_64
Distribution: "openSUSE 11.2 (x86_64)"

What I was doing when the application crashed:
firefox was running 64bit os of openSUSE 

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f76e34b1750 (LWP 3661))]

Thread 2 (Thread 0x7f76c8b8b910 (LWP 3689)):
#0  0x00007f76e2caf049 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f76e2f1f53b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/libQtCore.so.4
#2  0x00007f76df3f89ec in ?? () from /usr/lib64/libQtNetwork.so.4
#3  0x00007f76e2f1e485 in ?? () from /usr/lib64/libQtCore.so.4
#4  0x00007f76e2caa65d in start_thread () from /lib64/libpthread.so.0
#5  0x00007f76e06be14d in clone () from /lib64/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f76e34b1750 (LWP 3661)):
[KCrash Handler]
#5  0x00007f76dac50d94 in Plasma::ExtenderItem::group() const () from /usr/lib64/libplasma.so.3
#6  0x00007f76dac4f5a8 in Plasma::ExtenderGroup::items() const () from /usr/lib64/libplasma.so.3
#7  0x00007f76ca0652c3 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#8  0x00007f76ca065cb0 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#9  0x00007f76e3018fbc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#10 0x00007f76ca0663f2 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#11 0x00007f76ca067664 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#12 0x00007f76e3018fbc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#13 0x00007f76ca0685b7 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#14 0x00007f76ca068a8b in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#15 0x00007f76ca0762ba in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#16 0x00007f76e30132fd in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#17 0x00007f76e0df42ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#18 0x00007f76e0dfb57e in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#19 0x00007f76e19ee8d6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#20 0x00007f76e3003ddc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#21 0x00007f76e30049ea in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQtCore.so.4
#22 0x00007f76e302c803 in ?? () from /usr/lib64/libQtCore.so.4
#23 0x00007f76dfd3ddee in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#24 0x00007f76dfd417b8 in ?? () from /usr/lib64/libglib-2.0.so.0
#25 0x00007f76dfd418e0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#26 0x00007f76e302c3a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#27 0x00007f76e0e8731e in ?? () from /usr/lib64/libQtGui.so.4
#28 0x00007f76e3002712 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#29 0x00007f76e3002ae4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#30 0x00007f76e3004c99 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#31 0x00007f76d8465d6f in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#32 0x0000000000406f88 in _start ()

Reported using DrKonqi