anteck - 4:09 am on Feb 21, 2012 (gmt 0)
I have quite a few small sites with 336x280 adsense units running near the top - they haven't been affected at all. Meanwhile, one site that was ranking well dropped out with a 300x250 ad unit on the top right of the page. I took away the ad unit a month ago, and nothing has changed. I'd say the algo's broken - clearly isn't working as they 'say' it should be.