Background image excluding margins

Hi all,

Imagine a HTML page which uses a stylesheet containing a line like:

html {margin-left: 4% ; margin-right: 4% ; background-color: white ;
  background-image: url(sandston.gif) }

When I see such a file with Amaya, the background image also obeys the
"margin-left: 4% ; margin-right: 4%" request. In other words, the image
doesn't extend to the border. Is this the intended behavior? With any
other browser that I have access to, the request concerning the margins
applies to text alone, and I think that that's how it should be.

Best regards,

Jose Carlos Santos