sun.plugin.javascript exceptions are thrown when using Netscape 6 /Merlin build

sun.misc.URLClassPath.getResource(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.access$201(Unknown Source)
at sun.plugin.security.PluginClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at NervousText.run(NervousText.java:51)
at java.lang.Thread.run(Unknown Source)
java.security.AccessControlException: access denied (java.util.PropertyPermission user.home read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPropertyAccess(Unknown Source)
at java.lang.System.getProperty(Unknown Source)
at AppletCacheVerifier.verify(AppletCacheVerifier.java:33)
at NervousText.run(NervousText.java:52)
at java.lang.Thread.run(Unknown Source)

Platform Tested: Windows NT/2000
Browser : Netscape 6

The following exceptions are thrown when automated tests(Javascript)/Manual tests are run on Netscape 6.01 on windows using Plug-in merlin build 61/62.
The same applets run fine using Merlin 60 .These exceptions are thrown for
all the applets running in Netscape 6.

To reproduce the problem:

1. Install Java Plug-in Merlin build 62.

2. Load the following applet in Netscape 6.01

3. Follwing Exceptions are thrown but the applet is loaded fine.

Exceptions thrown :
___________________
Java(TM) Plug-in: Version 1.4.0
Using JRE version 1.4.0-beta Java HotSpot(TM) Client VM
User home directory = C:\WINNT\Profiles\vmanda
Proxy Configuration: Browser Proxy Configuration

----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
s: dump system properties
t: dump thread list
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------
java.lang.NullPointerException
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Native Method)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.println(Unknown Source)
at sun.plugin.usability.Trace.firePrintlnEvent(Unknown Source)
at sun.plugin.usability.Trace.netPrintln(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connectStep1(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connect(Unknown Source)
at sun.plugin.cachescheme.PluginURLConnection.fetchHTTPHeaders(Unknown Source)
at sun.plugin.cachescheme.PluginURLConnection.getLastModified(Unknown Source)
at sun.plugin.cachescheme.PluginJarCacheHandler.getJarFileFromCache(Unknown Source)
at sun.plugin.cachescheme.PluginJarCacheHandler.cacheHandler(Unknown Source)
at sun.plugin.cachescheme.PluginJarCacheHandler.getJarFilesPath(Unknown Source)
at sun.plugin.AppletViewer.loadJarFiles(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Native Method)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.showAppletStatus(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Native Method)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.showAppletStatus(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.SecurityContext.getURL(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.println(Unknown Source)
at sun.plugin.usability.Trace.firePrintlnEvent(Unknown Source)
at sun.plugin.usability.Trace.netPrintln(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connectStep1(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.retrieve(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.<init>(Unknown Source)
at sun.misc.URLClassPath$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getResource(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.access$201(Unknown Source)
at sun.plugin.security.PluginClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at NervousText.run(NervousText.java:51)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Native Method)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.showAppletStatus(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.SecurityContext.getURL(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.println(Unknown Source)
at sun.plugin.usability.Trace.firePrintlnEvent(Unknown Source)
at sun.plugin.usability.Trace.netPrintln(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connectStep1(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.retrieve(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.<init>(Unknown Source)
at sun.misc.URLClassPath$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getResource(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.access$201(Unknown Source)
at sun.plugin.security.PluginClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at NervousText.run(NervousText.java:51)
at java.lang.Thread.run(Unknown Source)
java.security.AccessControlException: access denied (java.util.PropertyPermission user.home read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPropertyAccess(Unknown Source)
at java.lang.System.getProperty(Unknown Source)
at AppletCacheVerifier.verify(AppletCacheVerifier.java:33)
at NervousText.run(NervousText.java:52)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.SecurityContext.getURL(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.println(Unknown Source)
at sun.plugin.usability.Trace.firePrintlnEvent(Unknown Source)
at sun.plugin.usability.Trace.netPrintln(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connectStep1(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.retrieve(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.<init>(Unknown Source)
at sun.misc.URLClassPath$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getResource(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at sun.plugin.security.PluginClassLoader.access$201(Unknown Source)
at sun.plugin.security.PluginClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Native Method)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.showAppletStatus(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Native Method)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.showAppletStatus(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Native Method)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.showAppletStatus(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at sun.plugin.javascript.navig5.SecurityContext.getURL(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.JSGetNativeJSObject(Unknown Source)
at sun.plugin.javascript.navig5.JSObject.<init>(Unknown Source)
at sun.plugin.navig.win32.AppletPluginContext.nativeGetJSObject(Unknown Source)
at sun.plugin.ActivatorAppletContext.showStatus(Unknown Source)
at sun.plugin.AppletViewer.println(Unknown Source)
at sun.plugin.usability.Trace.firePrintlnEvent(Unknown Source)
at sun.plugin.usability.Trace.netPrintln(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.connectStep1(Unknown Source)
at sun.plugin.protocol.jdk12.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.retrieve(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.<init>(Unknown Source)
at sun.misc.URLClassPath$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at sun.misc.URLClassPath.getLoader(Unknown Source)
at