bloard - 2:05 pm on Oct 25, 2011 (gmt 0)
One of my sites was hit Oct 14th. It has a Yahoo directory and dmoz link. Neither are paid. I was thinking the other day that one potential cause of the problem could have been a devaluation of those old directory links which had propped the site up for years and were by far the site's 2 most authoritative links.