This Facebook Developer has created a neat application for adding music to your Facebook profile. While few thousand Facebook members are using his application, the developer is probably unaware of the Google policies.
Read what this Facebook application page has to say - "Like this app? Click an ad (once a day at most) and let's get a better server (less crashes)." And this line is just above the Google Ads block.
From the rule-book - Adsense publishers may not request that users click the ads on their sites or rely on deceptive implementation methods to obtain clicks. Publishers participating in the AdSense program may not encourage users to click the Google ads by using phrases such as "click the ads," "support us," "visit these links," or other similar language.
Let's hope the Facebook app developer takes note before the Adsense team pulls the plug.