On a site that has not had good rankings for some months, I've begun to see a trickle of hits on some semi-competitive keywords. When I try and backtrack these searches from the log URL, though, I never see the site in the results. I can't see them in www, www2, or www3.
Any thoughts as to what is going on? Is there one server in Google's farm that has decided it likes that site? Is this significant in our current "pre-update" condition?