Have just written a new post on my blog: http://www.chrislowthian.co.uk/download-facebook-photo-albums-with-facepad/815/ If you scroll down to the social bookmarks you will the Twitter one is trying to post an url of "<!DOCTYPE HTML PUBLIC" which is not write. It is only happening with this post. Has anyone got any ideas?
That's the thing. I have been to the website and I have the latest version already. Its strange how it is only this one post.
It's the twitter link that is the problem. I've never seen this happen before...but it seems your not the only one that has faced it (unless that is you posting over at WP support about it too). I'd contact the man behind sexy bookmarks (he's usually very good at fixing problems with his app fast) and in the meantime remove the twitter button from the bookmarks.
Its all fixed now. Just for future reference, you just need to tick the "Reset all Short URLs" box and then "Save Changes" The above error happens with the short url service you are using is down or not working correctly.