I have a notification right above my earnings line in my Google Adsense account that says my ads have appeared on websites I haven't authorized. When I click on the "account settings" link and then on "unauthorized sites" it reports that the site is bing.com. Has anyone else had this happen? Is this weird? Why would bing show ads from someone's else's account or better yet, why would bing show adsense ads? Any idea what to make of this?