Not sure where to post this, so mods, feel free to move.

When I have scrolled to say, the fifth story on a page and click on that story, when I page back, it always goes back to the top of the page. The site used to work properly before. I have tested other sites and they behave as expected. I have also tested both IE and FF.

What has happened to the site for this to happen? Any fixes or workarounds?