User blog comment:BertH/Layout and navigation updates coming October 3/@comment-737801-20120927141553/@comment-3444778-20120927153648

I don't get how that works... It's a toggle, you just click the button to show the rail again. It doesn't "obstruct the view" of the rail any more than more than scrolling past the top navigation bar obstructs its view. If you want to see it again, you scroll up; likewise, here, if you want to see it again, you click the button. Also, the rail is shown by default, so it doesn't "prevent the proper display or function of... user interface and functionality," unless you tell it to. If I'm wrong, please enlighten me, but as I see it, this complies with the ToU.