There is a security update in the latest flash player update….it hited our app. 
…i think adobe has lack of documentation…If any of the following situations apply, you should read this article in detail:
- You use sockets or XMLSockets, regardless of the domain to which you are connecting
- You use addRequestHeader or URLRequest.requestHeaders in any network API call when sending or loading data cross-domain
or
- You provide access to content on remote domains as a web service provider
- You have SWFs that are exported for Flash Player 7 (SWF7) or earlier that communicate with the hosting HTML by any means
- You use “javascript:” through network APIs to communicate outside a SWF
go through the detail article for security updates ,if you are using any of the above from here
