product with variations not working after update

hey guys,
So many problems today with marketpress...
Please see this product with variations... on this subsite there is only one product with variations.
http://www.pixshopping.com/4m4progettazionistore/
Before the update was working good but now when I choose a variation the image is not changing...
can you please check it?
support access granted
thanks,
Paddy