Think I reported this to the wrong thread, so apologies for repeating myself but our site completely re-emerged from the depths of jagger yesterday across all dcs (on mcdar). Notably, our home page is now top when I do site:domain.com or site:www.domain.com with only www pages being returned. Also when searching on title of our home page we appear first (previously > 300). We did make a number of changes to titles (making unique), content and keyword frequency, but with 1500 html pages, we only got round to changing a few so this can't have made a difference. Either we were penalized (can't see a reason for this) or Jagger introduced a bug. IMO the fact that our home page now appears top for site:www.domain.com suggests that page rank is cascading in one direction rather than evaporating from across our whole site.