I looked at your CSS again, and the double values are still there.
If you don’t use #content, maybe you could remove it.
You also have this near the bottom of your CSS file.
/* Hides from IE-mac \*/
* html .clearfix {
height: 1%;
}
.clearfix {
display: block;
}
/* End hide from IE-mac */
It’s not really hidden from IE-Mac.