FlexPilot.as

      // Returns a wrapped version of the method that returns
      // the Error obj to JS-land instead of actually throwing
      var genExtFunc:Function = function (func:Function):Function {
        return function (...args):* {
          try {
            for (var arg:* in args){
              // Terrible hack working around half baked
              // ExternalInterface support provided by
              // Safari on Windows
              // takes json strings and turns them into objects
              if (args[arg] is String){
                var o : Object = JSON.decode(args[arg]);
                args[arg] = o;
              }
            }
            return func.apply(null, args);
          }
          catch (e:Error) {
            if (e.errorID == 1009){
              e.message = "There was a problem with your parameters, " + JSON.encode(args);
            }
            return e;
          }
        }
      }