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incrediBILL - 2:57 am on Jul 19, 2010 (gmt 0)
If Google can't realize you IMPROVED your site for your visitors then it looks badly upon them, not you.
What has making a site good for visitors have to do with a spider (Googlebot) liking the site?
People revamp sites and make colossal mistakes everywhere from changing page names, titles, meta tags, losing H1s, fancy javascript menus and all sorts of pure nonsense that sends the page into the pits of the search engine.
I'm sure doing a quick review of the pages before and after the revamp will be illuminating.