IFTTT happened to it...and I've not had time to fix it. Bummer. Basically Tumblr seems to have taken a dislike to its pages being posted to by IFTTT 'recipes' which is exactly what I'd set up to cross post new forum topics and additions to the Filmwasters.com Flickr group. So after a very happy few months Tumblr suddenly decided there was 'suspicious activity' on the Filmwasters page and closed it off until I changed the password....I may just reset the IFTTT feeds and see what happens because I can't think of another way of keeping the blog alive with targeted auto-posts.
I've been meaning to sort it out for ages, but not gotten round to it.