I tried the code in FF3.5 and IE8. The background color defined for "header" div, in FF3.5 the entire header div has that color. But in IE8, the background color shows only for the banner and the header h2 in intro div.
So the question is should the background color apply to the entire header div or is it meant only for a specific portion?
And for container div, the attribute class has the value "container". This class is not defined in the css.