jomaxx - 4:16 pm on Apr 8, 2005 (gmt 0)

Google cannot see the Yahoo page from the referrer field. The referrer contains the page on which the AdSense code is located.

Someone suggested recently that the Javascript code COULD theoretically make a note of the referring page. That code can be plainly viewed and there is indeed a bit of processing related to the document.referrer, which seems to be related to the way AdSense can be embedded in framed sites, but it could conceivably allow Google to track the original referring page.

The main point is that it's not necessary to guess or theorize. This is testable. It would take about 15 minutes to load a mock AdSense frame and see what information gets passed through.