I was mouse clicking the drop-down application menu for Thunderbird from the task-bar at the bottom of the screen - method: hover over my Thunderbird application icon, then when the drop down displays hover over that & mouse click it.

The crash can be reproduced every time.

Unusual behaviour included complete blanking of screen, except for small window, an applet, showing the wireless connection shortcut or at least its logo, in top left corner that says for about a second, and then shows some unusual behaviour - shows a box shaped field of coloured lines in the lower right corner of the screen.  The computer always then restores itself to the graphics screen (no5 of the 6 available) of my full monty pclinuxos installation.


Reproducible: Always

Steps to Reproduce:
1. See "details" description above
Actual Results:  
1. See "details" description above

Expected Results:  
Open & go to active screen for selected application.

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/libgobject-2.0.so.0.3400.3-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
[Current thread is 1 (Thread 0xb51f86e0 (LWP 4485))]

Thread 2 (Thread 0xa9bfcb70 (LWP 4491)):
#0  0xb771c424 in __kernel_vsyscall ()
#1  0xb6ae802c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/libpthread.so.0
#2  0xb1bd06b7 in ?? () from /usr/lib/libQtScript.so.4
#3  0xb1bd0701 in ?? () from /usr/lib/libQtScript.so.4
#4  0xb6ae3e89 in start_thread () from /lib/i686/libpthread.so.0
#5  0xb5df540e in clone () from /lib/i686/libc.so.6

Thread 1 (Thread 0xb51f86e0 (LWP 4485)):
[KCrash Handler]
#7  0xaee6391b in ?? () from /usr/lib/kde4/plasma_applet_smooth-tasks.so
#8  0xaee6444a in ?? () from /usr/lib/kde4/plasma_applet_smooth-tasks.so
#9  0xb61997ca in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#10 0xb6140334 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#11 0xb6145b20 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#12 0xb7477621 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#13 0xb6c6ecfb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#14 0xb61412a2 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib/libQtGui.so.4
#15 0xb61ca7ac in ?? () from /usr/lib/libQtGui.so.4
#16 0xb61c8c77 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#17 0xb61f3a22 in ?? () from /usr/lib/libQtGui.so.4
#18 0xb57698ae in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#19 0xb5769c48 in ?? () from /usr/lib/libglib-2.0.so.0
#20 0xb5769d21 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#21 0xb6ca0d2c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#22 0xb61f3635 in ?? () from /usr/lib/libQtGui.so.4
#23 0xb6c6d819 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#24 0xb6c6db2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0xb6c72b2f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#26 0xb613e1b7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#27 0xb081c029 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#28 0x0804dc54 in _start ()