So I have a slightly odd bug in the backend. I assume its server related as several sites on the same hosting picked it up at the same time. It uses PHP 5.2.9 so sadly we can't upgrade as all other versions use 5.3
Anyway - When you click save an publish, the 'saving..' message appears but it doesn't go any further. A look at the console reveals a reponse is being received, and if you refresh the page the changes can be seen.