CKeditor CSS page body issue

CKeditor by default picks up the default body css from the ellington theme and displays the orange and grey background image in the editor window.

To fix this I have modified the following:

ellington/css/style.css
////
body {
background-color:#fff;
font-size: 12px;
color: #333333;
font-family: Arial;
}
#PageBody {
background: #333333 url('../img/body_bg.jpg') repeat-x left top;
font-size: 12px;
color: #333333;
font-family: Arial;
}

////
ellington/page.tpl.php
////
print $body_classes; " id="PageBody">
////