I've heard to definitely pick a version of your site, either with the www or without, and stick with it. We chose to promote this site without the www but google always lists it with the www in the url. We have alot of other sites, done the same way, that google does not use the www when listing them.
For some reason, google changed the way this site is listed on some of the data centers to show it without the
www....which is what I always wanted (that version has more backlinks and a higher page rank).
Anyway, the reason for my post was to see if this had ever happened to anyone else, or if anyone had any theories as to why this happened now.
Are ya'll seeing dance type moves in Google. A number of our sites moved up yesterday, just wondering if anyone else is seeing similar moves with their sites.