This has nothing to do with JACC. You have to be running with a security manager to see this type of error. If you not comfortable configuration the jvm security policy, don't run with a security manager. If you need to run with a security manager you should understand how to configure the security policy or else its doubtful that your securing what your supposed to.
Quite right Scott.
I was inadvertantly setting a "grant all" security manager in one of my common libraries so that my app could be downloaded with webstart as a secure application.
Removing that fixed the problem. I now only invoke the security manager with WebStart and RMI apps.