I can't figure out why wp_head is adding a margin to the top of my theme and bumping everything down. Here is the current code I have at the top of my header.php file. The only plugins I have active are Akismet and Under Construction (only allows your site to be seen when you are logged in).
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" href="<?php bloginfo ('stylesheet_url'); ?>" />
<?php wp_head(); ?>