Testcase 4789981 is failed for 1.3.1_13-b01 on both Solaris 8 and Solaris 9 with browser Mozilla 1.0.1 version. Mozilla browser is crashed while testing this bug with the following error.

Exception in thread "Thread-3" 
**************** SERVER ERROR **************
Exception occurred at start of handle_code()
**************** ************ **************
Exception in thread "Thread-3" 
**************** SERVER ERROR **************
Exception occurred at start of handle_code()
**************** ************ **************

This testcase passed with 1.3.1_12-b03 without any errors.

to Reproduce:
============

Run the following testcase using JTReg tool.
/net/shiva.sfbay/test/MyTestArea/JDK1.3.1/workspace_131/test/CTE_REGTEST/Generic/4789981

This is a manual testcase. Follow the instructions to execute.
Test will be failed for 1.3.1_13-b01 with the above error.
  xxxxx@xxxxx   10/13/04 01:47 GMT

N/A

There're 2 test cases associated with 4789981. 
Initial investigation shows that test case 2 failed with 1.3.1_13. Test case 2 is the one with the signed applet and Mozilla crashes upon granting the permission to the applet at the security dialog. Test case 1 ran fine with 1.3.1_13. Both test cases PASS with 1.3.1_12.
Running with "mozilla -debug" and with JAVA_PLUGIN_TRACE set to 1 shows that there's an NPE with stack trace as follows:
java.lang.NullPointerException
        at sun.plugin.javascript.JSClassLoader$1.run(JSClassLoader.java:95)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.plugin.javascript.JSClassLoader.bounce(JSClassLoader.java:88)
        at sun.plugin.javascript.JSClassLoader.invoke(JSClassLoader.java:46)
        at sun.plugin.liveconnect.PrivilegedCallMethodAction.run(SecureInvocation.java:5
43)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.plugin.liveconnect.SecureInvocation$2.run(SecureInvocation.java:145)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.plugin.liveconnect.SecureInvocation.CallMethod(SecureInvocation.java:124)
        at sun.plugin.navig.motif.AThread.handleRequest(Native Method)
        at sun.plugin.navig.motif.AThread.JNIHandleLoop(AThread.java:33)
        at sun.plugin.navig.motif.AThread.run(AThread.java:25)

The above NPE repeats a few times before the browser crashes.
I'll continue investigation.
  xxxxx@xxxxx   2004-08-06

This bug is not reproducible with Tiger beta3/b62 with mozilla 1.4.
  xxxxx@xxxxx   2004-08-09

The root cause is that the JSInvoke class is missing in the javaplugin.jar file for the Solaris and Linux platforms.
  xxxxx@xxxxx   10/13/04 01:47 GMT