There's an alert coming up when navigation this site all of a sudden. It's a result of the ustream box on the right of all the pages on the site. I managed to fix it using the AdBlockerPlus extension for Google Chrome to create a filter to stop the ustream box even loading, I'm not getting the error anymore.
If anybody has any other fixes please try and post them here. Also, if you're getting the issue please post a comment to this question saying so.