I see there are already several posts on the crossdomain issue, but I will nonetheless contribute to the genre.
I am developing a Flash social network application that is based on the
Flash SDK provided by Yahoo. Everything works fine locally, but when running from my server the application is blocked from accessing Yahoo, and I believe the reason for that is the crossdomain policy that is assigned to the server that is defined in the SDK:
https://api.login.yahoo.com/crossdomain.xml.
So as soon as I call the getRequestToken method to begin the OAuth authorization sequence, I get a security error #2048 security sandbox violation...my server..cannot load data from...Yahoo's server....etc.
Is there anyone out there who managed to get a Yahoo social application working despite what looks like a very restrictive crossdomain policy? is there any reason to hope that that policy will be changed in the very near future? any ideas for workarounds? is everyone out there setting up proxies to "build a fun and powerful application using the Yahoo! Social APIs"?