Hi, During development, Flex Builder automatically gets the flash player to trust your swf so that you won't encounter this issue.
Yahoo's crossdomain.xml allows access to content if the app is hosted on *.yahoo.com. (Eg: news.yahoo.com, etc.). It's not wildcard access that lets anyone access their data. Your app would have to be deployed on a subdomain of yahoo.com. Cheers, -- Anirudh Sasikumar http://anirudhs.chaosnet.org/
