Problem returned here this morning for a long time, at the moment it's disappeared again: no way of preventing it in long term? I am amazed something like this is possible, but then I'm very inexperienced "in that field", as they say............
I've no problems here, but this "spam" is affecting other live forums and appears to be coming from abroad somewhere. Even when a website has a "spam filter" , the odd offender can slip through the net, unfortunately :(
I have been in touch with Ash about the ongoing problems with Dummy.com which the advert company promised had been resolved last night. Ash sent me a message saying "please can you ask the users still affected to clear their browser cache" (foreign language to me!). This should hopefully clear the problem and the link is : http://www.wikihow.com/Clear-Your-Browser's-Cache