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Has anyone else checked their rankings today and noticed a big shift? We just got smacked by G big time.

In the last 3-4 days we've had several thousand 'duplicate content' warnings appear in our crawl report, 99% of them related to our on-site blog. The blog is BlogEngine.Net, but the pages simply don't exist. The majority seem to be Roger trying quasi-random URLs like:
/?page=410 /?page=151 Etc. etc. The blog will present content for these requests, but it is of course the same empty page since there's only unique content for up to /?Page=10 or so. Two questions: 1. Did something change recently? These blogs have been up for months, and this problem has only come up this week. Did Roger change to become more aggressive lately? 2. Suggested remediation? On one of the blogs I've put no-index no-follow for any page that has a /?page querystring, and we'll see what effect that has come next crawl next week. However, I'm not sure this will work as per: http://moz.com/community/q/functionality-of-seomoz-crawl-page-reports Anyone else had dynamic blogs suddenly blossom into thousands of duplicate content warnings? Google (rightly) ignores these pages completely.