This test determines if your page experiences any redirects on initial load. Redirects require the browser to resend page requests and significantly increases initial page load time.
Checking for image sprites
This test checks to see if HTTP or HTML redirects are in place for the tested page. If any redirects are detected then the test reports a FAIL.
If you receive a FAIL for this test, you should consider removing the necessity for redirects on page load.
This test is based on a YSlow best practice. See http://yslow.org/faq/ for more details.