Adsense updates the rules

Just in case you didn't already know, Adsense has recently updated their policies. There are several changes around how and where ads can be placed - mainly to prevent ads from blending in with the design of the page and being mistaken for a menu of some sort. I wouldn't mess around with this, just make the changes to ensure you are compliant.

Read up:
http://.../google_adsense_14.html