Currency conversion working fine on product page but incorrect in the cart

Hi Guys

Multi currency is converting my product costs correctly on the product pages but once added to cart the price is increased in the cart by quite a lot! A customer alerted me to this error which is troubling me. I don’t know how to solve it

Choose any product and use EUR or USD for example. Note the price on the product page then add to cart and go to checkout, you will see the price changes and increases – the customer is charged this increased price as I am processing refunds at the moment