This issue was solved after installing update pack 5
Ever since I made the brave step to go for cinnamon I have had to "put up" with a problem I expected would get fixed in an update.
Well it did didn't.
Everything is as normal then the screen drops back to just the desktop background with out icons for a few seconds and then all is restored.This happens at random
Well now I have started to use the print screen button and the screen shot applet I discover that although selection of windows / full screen /selected area appears to work. I only get a image of the background inc icons.
I have in once case seen some apps in view but they are already old as if held in a buffer.
I have also noticed that via desktop remote only a black Gnome3 screen is shown but no control.
The issues I list above do not happen in mate although there I have no menu bottom left
Anyone know anything about these issues
CINNAMON KEEPS CRASHING as well !