Images not loading when sending

This has only recently happened after an update.

When adding new images to a newsletter they show fine in the admin preview but when sending the email the images are broken.

It looks like its adding a new . to the url.

So, http://www.websiteaddress.co.uk becomes http://www.websiteaddress..co.uk

Its only happening for new images added to the email and not ones from the theme.

Any ideas?