Fresh off the report that Google was bypassing the privacy settings of Safari users by installing cookies that could track browsing habits, Microsoft has discovered that Google has been doing the same thing on Internet Explorer. This is not good.
According to Microsoft VP Dean Hachamovitch, after the Safari Google cookies snafu hit, the Internet Explorer team discovered that Google was "employing similar methods to get around the default privacy protections in IE and track IE users with cookies" too. Microsoft has found that Google bypasses the P3P Privacy Protection feature in IE to track users. Google is breaking the rules, specifically:
Basically, Google wrongfully bypasses the protection and enables its cookies to be allowed rather than blocked. Thus allowing Google to track the browsing habits of Internet Explorer users. In the mean time, Microsoft has made a Tracking Protection List to protect IE9 users from Google. The list can be found here. [IE Blog]