Jarring an entire Applet and signing this file using a certificate
 that has been verified by Verisign, that will invoke a Java Plugin
 Security warning Dialog to appear when accessed thru a browser.

   The same is also true if you breakup your Applet into multiply jar files,
 bundling parts of the Applet that will access the local resources of the client into a signed jar file. When a user invokes the Applet from the Web Server
 thru the Applet.class and a reference is made from the Applet.class to the
 signed jar a Java Plugin Security warning Dialog will appear to quiry the end
 user.

   You can see this by acessing http://greatpoint/test_ok.html
 and clicking on the test button. Note Java Plugin 1.3 is needed.

    Though if the user invokes the Applet via an unsigned jar and a
 reference is made to the signed jar file an
 java.security.AccessControlException will be thrown in the Java
 Console of the Java Plug-in.

    You can see this by acessing http://greatpoint/test_fail.html
 and clicking on the test button. Note Java Plugin 1.3 is needed.

 The difference is that the Applet.class is now jarred.

 The testcase is in the attachments.

 1) Save all the files into the public_html directory of a Web Server and
    and untar test.tar creating a test directory that holds the MyApplet.class.

 2) Access the test_fail.html to see the bug and access test_ok.html to see
    the desired behavior.