Go see piratebay.org homepage for example of "the flicker" and you'll see what I'm talking about.
Change <!DOCTYPE html>
to:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/xhtml1-strict.dtd">
Change <!DOCTYPE html>
to:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/xhtml1-strict.dtd">