User blog comment:BertH/Layout and navigation updates coming October 3/@comment-1430834-20120921091621/@comment-5275700-20120921193509

At the moment, as you can see from previewing the changes, sliders will remain at 660 wide and will be left-aligned in the 670-wide space. We're looking at options for how to handle sliders in the new width, but there is no imminent change.