Ever since Google addressed AdSense placement with their Don't run the risk of click and miss blog post, people were confused.
So Google saw fit to write another blog post named A clarification on accidental clicks. In this post they showed examples of acceptable ad locations and implementations and none acceptable.
Good:
Bad:
The bottom line is, will someone accidently click on your ad without meaning to do so? That is what you need to ask yourself when placing your ads on your Web site.
Forum discussion at Google Groups.
