I was playing in Google Webmaster tools and found this today. Somehow on the 29th of Feb Google now has 1000s of URLs to search URLS from Xenforo. This would be about the day I upgraded to the latest version. I have now blocked it in our robots.txt file but does anyone know how Google is seeing thousands of search queries? They get a 403 because we do not allow 'guests' to use the search. Thanks for any insight!