rainborick - 1:12 am on Mar 15, 2012 (gmt 0)
I've never seen Google pay any attention to HTML comments. In fact, I've seen strong evidence that they are completely ignored. It only makes sense. People stick all kinds of things in comments for a wide variety of purposes. I can't imagine why a search engine would do anything else. And as far as Panda is concerned, Panda is aimed at the user's experience and since HTML comments are invisible to users, there's no reason they should have any effect.