pontifex - 7:08 pm on Jan 30, 2011 (gmt 0)
@Brett: the "low quality on page" and this "dupe check" noise we suddenly hear in the past 10 days are IMHO related. I would not disregard a strong relationship between these 2 "major" algo changes as you did in the response to this post! In fact I do believe these are both on-page measures and are both implemented at the same spot in their ranking process.
Further, I do vote for "Seedfinder" update... at least they TRY to find the seed of that content :->