I am quite confused about the way Google is behaving. Ever since the last PR update, my SERPS seem to be fluctuating. I observed that quite a few pages that were cached are no longer cached. My homepage is still cached. I guess the cache issue is related to the change in SERPS. The page that is not completely optimized shows up since specific pages are no longer cached. Does this mean that I need to fix something on my site? Has anyone else observed anything like this? Would you like to share your experiences with me?