CODE
<!-- begin code provided by createblog.com -->
/* on your menu module, this edits the body part of it */
background-image: url(http://skins.cbstaff.com/001_050/skin031_blog.gif);
background-color: #000000;
border: #ff6699;
}
<!-- end code provided by createblog.com -->
^ That's in your custom header.
Remove the 'http://skins.cbstaff.com/001_050/skin031_blog.gif'.
Then it should work properly.