patc - 4:17 pm on Jan 31, 2011 (gmt 0)
Does anyone else see correlation between these updates and a mid Jan (12-13th in my case) drop? I'm trying to understand if it is a dupe penalty I'm suffering, as had a competitor scrape my site in December and sent thousands of people from #*$! sites to it. (they kept my stats code on the page stupidly so I saw it happening).
Convinced this is the reason for my drop but have passed through one reconsideration request with no joy after having got the scraper site taken down.