Plugin2: Under some scenarios applet fails to return values to calling javascript

This scenario caught a regression w.r.t. 6UR. Javascript calls a applet method which returns a java object but with present behavior the returned java object is not getting passed onto the calling javascript. e.g. following call inside the html
var props = app.getSystemEnvironment(), should return java.util.Properties, but in actual nothing is getting returned
- Try loading the following applet inside the browser
http://sqeweb.sfbay.sun.com/deployment2/jitu/deployment_JDK7_int_ws/deployment/src/plugin/manual/html/SecuritySysEnv.html
- If you can notice above mentioned behavior then bug is reproduced