Well, i'm heading on vacation for a week and don't have time to do this before I leave tomorrow. It would take a fair amount of time. It sounds from most of the responses here that I should just leave it. Something is fishy, but until I know what it is I don't feel obliged to act...
removing ad codes from ALL sites? and that too when you are getting above average clicks and making more money??now thats really bad suggestion IMHO