As it says. With every single browser (except for Internet Explorer), this happens: http://www.elitepvpers.com/forum/web-development/1847846-question-css-html-width-problem.html The html container isn't adjusting according to the width of the content, but to the width of the window. Then, when you scroll, that html container doesn't follow you and keeps to the size of the window. It's creating problems on my website and multiple others such as... http://www.w3schools.com/ http://co.91.com/index/ http://stackoverflow.com/ http://google.com/