Naomi.. you might be having problems with your browser caching since the update. i.e Internet explorer is still showing you the version of the site before the update. Please try pressing CTRL+F5 together on your keyboard to clear the cache, and try again? I had the same issue on my PC with Internet Explorer 11, but it was resolved after the cache clearing.
Ed. As I hope, a temporary measure, I've painted a [Zen] circle in transparent cadmium yellow to act as a new avatar so that I can type over it and see what I am doing. Can you please remove the jelly man and see how I get on like this for now.
Ed. I think i've done it !!!!! I went to something called 'refresh firefox'
which too a few minutes and the avatar is behaving normally.
Drinks all round!