<http://www.apple.com/ipad/> has a horizontal scrollbar, no matter how wide the window is made. This is caused by the 40px horizontal margins on the <figure> element, which was introduced in <trac.webkit.org/changeset/73613>.
<rdar://problem/9094134>
I do not see the horizontal scrollbar any more, though this may be due to content changes. Since this is not know to affect any other sites, I think we should close this.
Content has changed to specify margin: 0 on figures.