Hi Rob
No it isn't.
I was wondering whether I should disable my Avast anti-virus and try reinstalling?
Another couple of oddities -
1. When I create a clone, it places the clone way off, almost halfway off the PI desktop
2. When applying a mask, I can no longer drag and drop it onto the lefthand bar of the image window. I can only apply the mask by right clicking and selecting the Mask context menu.
Thanks for your help.