AdSenseAdvisor - 11:08 pm on Jun 23, 2006 (gmt 0) ASA
We experienced a minor problem with our system where AdSense users who chose Google Pack Referral buttons saw Firefox buttons on their site. The Firefox buttons should normally be displayed in place of the Pack button only to non-US visitors to your site. Our engineers have resolved this issue, although it may take up to an hour for the change to take effect across the board. Thank you for your patience!