Not sure if it's only for those with domain hosting, but once I set a notification to be sent by email, and the email comes, the links in it (both the topic link and the link to the notifications page) go to:

http://http//support.random-image.net/[the rest of the URL...]

which obviously doesn't work

When I setup the domain, I must have added the http:// prefix to the database record when it is clearly not needed. I've removed it so it should only have the one http:// now