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I noticed that many of SEOmoz' own pages, those that aren't XML, start off with a simple , without all the other stuff that's on top of nearly all other sites. Is there a reason behind this? Does it have to do with HTML5 instead of 4.1? Should this be done as a general rule, or is it situational?

I have a site, spirithome.com (despite the name, a non-com site), that for reasons I don't know took a hit with Panda, and has been drifting down ever since.  What can someone do to stop an overall slow drift down?  (PS: it just came off a predictable seasonal high; I'm talking of an overall picture.)