In case invalid user defined property is specified JVM fails to start e.g. if property with name=value is specified with value containing spaces in it but not put in "", then JVM fails to launch
Try to load the following applet
http://sqeweb.sfbay.sun.com/deployment2/jitu/deployment_mustang_exec_ws/deployment/src/plugin/runtimeArgs/runtimeArgs/html/secure/TestUntrustedSecureM.html

If JVM fails to launch then bug is reproduced