Hi, Flash player 11.3 beta is out I've updated the framework_buildscript.xml to be able to compile against this.
I've run the build script and did a simple test to check if an existing app would still work using this SDK. Note that we still have an issue with the 11.0/11.1 playerglobal.swc not being publicly available and by default the build script target Flash Player 11.1. Thanks, Justin