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keyplyr - 6:29 pm on Jan 16, 2007 (gmt 0)
I also removed 301 redirects of defunct pages that were now pointing to home page.
"very controlled experiment" or not, it worked so I'm happy. No, I don't allow pages be cached by SEs (at least not the way you mean), but I did remove one word from the site description and the new description displays in SERP.