Background colour issue

Site is here and theme is technical speech.

For some reason when changing the background colour code in style.css….

/*Basic Styles*/
*{margin: 0px;padding: 0px;}
a{color:#666;text-decoration:none;}
a:hover{color:#31B640;text-decoration:none;}
a img,img,img a{border:1px solid #EEE;padding:0;background-color:#EEE;}
body{background:#<strong>fff</strong>;font-family:Arial, Helvetica, sans-serif;}

…as shown here, the main white in the middle of the page remains on the home page but disappears on all others IE on posts, catergory’s. Obviously this make reading difficult as we would like #123 as bg colour but for the central area, which is to remain white.

It’s almost as if there is a white image stuck in there somehow but only on the HP, almost like a frame.

Will be most grateful if anyone has an idea on this.