tedster - 3:24 am on Dec 2, 2010 (gmt 0)
I certainly agree with you. Google says this change affected only about 100 sites - so it doesn't sound like whatever they did should have widespread effect or open up to many attack vectors.
That's one reason why I wondered if anyone saw this affect their site. We know the date and almost the time of the algo change - that should narrow it down quite nicely.