Hi Murf,
Click on the link below and look at the picture, do they look like this? If so best treat or remove that plant otherwise it will spread to your other fuchsias. If it's just a case of curling, have a look on the underside of the leaves and see if you have any other pests ie whitefly/greenfly etc and spray accordingly - Kath :)

Here is a link that might be useful: http://faq.gardenweb.com/faq/lists/fuchsia/2002101511028540.html