onepointone - 7:17 am on Mar 13, 2011 (gmt 0)
About a month ago all of my sites with adsense on them, (save for one - possibly two) were Banned. Not penalized, Banned. Others without adsense, no problem.
I've been going through them all carefully, looking for some connection. Maybe something they have in common.
I have to admit, I've found a few things on a couple of WP sites, out of the dozen or so. Two had spammy type plugins installed. One I had installed myself, one I had missed... it was on a purchased website.
Overall, most of the sites seem squeeky clean, at least to me.
Even though I think having adsense, not directly responsible for my problem, still decided to take it off existing and future sites. Not worth the risk.