I haven’t had a chance to spend much time with the new release, but it promises to address what I saw as the biggest shortcoming of prior releases – that it only crawled the DOM and didn’t capture network traffic. The new version promises to do both, providing a much more complete picture.
I was a bit disappointed to see that a bug I had reported in prior versions still remains – YSlow falsely identifies redirects. For example, today on www.aol.com there are 3 redirects, but YSlow identified 20 - the other 17 are listed as “redirects to <blank>” .
Nevertheless, a great tool.