Start of source is
<!DOCTYPE html>
<!--[if IE 6]>
<html id="ie6" lang="en-US">
<![endif]-->(No blank line there)
Start of page div is:
<div id="page" class="hfeed">
<header id="branding" role="banner">
<div id="header-content" class="clearfix">Is that what you mean? - the blank lines between the page div and the header?