Something changed at SE, or at least EE.SE in the last few hours. I just logged in, and the same browser window size I had been using doesn't work anymore without very annoying horizontal scrolling. It appears the reason is that the buttons HOME, QUESTIONS, TAGS, USERS, and UNANSWERED are now on the left, using up more window width. These used to be at the top where they weren't really in the way.
On the off chance someone at SE cares, I don't like this because now I can have only one slim window on the screen at the same time, whereas previously more of my screen was left to my uses. I use the browser for various things other than SE, and having to resize the window between uses is a pain. It's also totally unnecessary for SE to require that much window width.
However, the question is, How can I get the old layout back?.