According to Andy Beard there’s yet another PageRank update going on at the moment. It seems that Big G are determined to protect their revenue model improve the world by reducing PageRank for any sites that may or may not have been involved in the far more financially beneficial use of alternative revenue generating methods spamming the index.
As a result it is imperative that you ensure that all of your outbound links use the “nofollow” tag. This is also known as a link condom. This will prevent your average Joe from making more money from AdSense alternatives the Google index from being polluted by renegade entries and ensure that Google continue their plans for world domination…mwhahaha… return relevant search results.