Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.5 (KDE 4.3.5) "release 0"
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-0.2-desktop x86_64
Distribution: "openSUSE 11.2 (x86_64)"

What I was doing when the application crashed:
I cannot explain the initial disappearance of the taskbar in the first place other than to say that it accompanied removing a widget from the bottom panel i.e. I did not engage in any dialogue which mentioned removing a panel or the taskbar. Since the taskbar disappeared (collapsing everything on the bottom panel to the left) any window that I minimise, disappears without any on-sceen means to restore the task to view. I seemed to find a solution on the openSUSE forums but whenever I right-click on the bottom panel in the extensive blank region now positioned on the right the screen intially goes black and then the crash error message pops up.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f5bc06f5750 (LWP 4409))]

Thread 2 (Thread 0x7f5ba637d910 (LWP 4410)):
#0  0x00007f5bbfec2049 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f5bc013253b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib64/libQtCore.so.4
#2  0x00007f5bbc6039ec in ?? () from /usr/lib64/libQtNetwork.so.4
#3  0x00007f5bc0131485 in ?? () from /usr/lib64/libQtCore.so.4
#4  0x00007f5bbfebd65d in start_thread () from /lib64/libpthread.so.0
#5  0x00007f5bbd8c8e1d in clone () from /lib64/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f5bc06f5750 (LWP 4409)):
[KCrash Handler]
#5  0x00007f5bbe0408c0 in QWidget::mapToParent(QPoint const&) const () from /usr/lib64/libQtGui.so.4
#6  0x00007f5bbe04091b in QWidget::mapTo(QWidget*, QPoint const&) const () from /usr/lib64/libQtGui.so.4
#7  0x00007f5ba7d07bf4 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#8  0x00007f5ba7d08228 in Plasma::Theme::font(Plasma::Theme::FontRole) const () from /usr/lib64/kde4/plasma_applet_systemtray.so
#9  0x00007f5bc022bfbc in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#10 0x00007f5bc0225f63 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#11 0x00007f5bbdfff2ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#12 0x00007f5bbe00657e in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#13 0x00007f5bbebfa016 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#14 0x00007f5bc0216ddc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#15 0x00007f5bc024271d in ?? () from /usr/lib64/libQtCore.so.4
#16 0x00007f5bc023f678 in ?? () from /usr/lib64/libQtCore.so.4
#17 0x00007f5bbcf48dee in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#18 0x00007f5bbcf4c7b8 in ?? () from /usr/lib64/libglib-2.0.so.0
#19 0x00007f5bbcf4c8e0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#20 0x00007f5bc023f3a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#21 0x00007f5bbe09231e in ?? () from /usr/lib64/libQtGui.so.4
#22 0x00007f5bc0215712 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#23 0x00007f5bc0215ae4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#24 0x00007f5bc0217c99 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#25 0x00007f5bb5671e3f in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#26 0x0000000000406f88 in _start ()

This bug may be a duplicate of or related to bug 213813

Reported using DrKonqi