On a new Samsung Android phone (4.1), only the top half of the header image will show in ‘landscape’ view, but will be fine in ‘portrait’ view. But on a Toshiba “Thrive” Android tablet (4.0), only the top half of the header image will show in ‘portrait’ view, but will be fine in ‘landscape’ view (in Firefox). [Note: It works fine in Safari/Chrome on an iPhone4 w/ iOS6].
[ NOTE: You can see this ‘issue’ on a desktop browser by making reducing the width of the window to about half the width, and it will then only ‘render’ the top half of the header image.]