In the old interface they used to let you switch off things like interest based ads, expanding ads, video ads and 3rd-part advertisers. when it changed over to the new interface all of that disappeared, but they gave you an option to switch back to the old interface again so you could access them.
but if you click on that same link now it just returns you to the main page again (maybe it's a bug).
i've had a good look through all of the menus in the new interface but I can't find those settings anywhere. does anyone know where they've hidden them?