My site at... http://seimphotography.com/photography-2008/ has a header and navigation that is set wrong.
The only way I can get it to work is to use negative margins. Even at zero they are not positioned properly, and if I do use the negative margins it breaks the site in IE6
I though I could counter this by putting right. bottom margins to push the content to correct position but it does nothing.
Here is my stylesheet if you want to look at the content of it... http://seimphotography.com/photography-2008/wp-content/themes/jillij-11-r1/style.css