I am using the luna defaults for .content and .contentwrapper. I want to enclose information in a div in the content area (surrounded by the nice shadows).

But the content area stops (except the lefthand shadow) before my content has stopped. What is wrong with my div?

.bizcolcentre {
border: solid 1px #000000;
float: left;
width: 90%;
background: #ffffff;
color: #000000;
text-align: left;
position: relative;
top: 0px;
clear: both;
}

The luna defaults are these (content is nested inside contentwrapper). I included the default hack, just in case it is relevant
#contentwrapper {
width: 100%;
float: left;
position: relative;
}
#content {
margin: 0px 10px;
padding: 10px;
background: #ffffff;
}
/* hack for ie/win's guillotine bug */
/* start non ie/mac css \*/
* html #content {
height: 1%;
}
/* end non ie/mac css */