When I try to bring up the JCK Slave Agent Applet using b80 on NS4.76, it has following error message on Jave console.

Error Message:
--------------
java.util.regex.PatternSyntaxException: Illegal repetition around index 0
        {xdigit}{1,4}.{xdigit}{1,4}.{xdigit}{1,4}.{xdigit}{1,4}
       ^
at java.util.regex.Pattern.error(Pattern.java:1436)
at java.util.regex.Pattern.closure(Pattern.java:2441)
at java.util.regex.Pattern.sequence(Pattern.java:1560)
at java.util.regex.Pattern.expr(Pattern.java:1452)
at java.util.regex.Pattern.compile(Pattern.java:1241)
at java.util.regex.Pattern.<init>(Pattern.java:997)
at java.util.regex.Pattern.compile(Pattern.java:744)
at java.util.regex.Pattern.matches(Pattern.java:830)
at sun.plugin.cache.FileVersion.convertToLong(FileVersion.java:94)
at sun.plugin.cache.FileVersion.setVersion(FileVersion.java:68)
at sun.plugin.cache.CachedJarLoader$3.run(CachedJarLoader.java:230)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.cache.JarCache.privileged(JarCache.java:340)
at sun.plugin.cache.CachedJarLoader.getCacheFile(CachedJarLoader.java:200)
at sun.plugin.cache.CachedJarLoader.<init>(CachedJarLoader.java:85)
at sun.plugin.cache.JarCache.get(JarCache.java:286)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(CachedJarURLConnection.java:81)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(CachedJarURLConnection.java:63)
at sun.misc.URLClassPath$JarLoader.getJarFile(URLClassPath.java:501)
at sun.misc.URLClassPath$JarLoader.<init>(URLClassPath.java:462)
at sun.misc.URLClassPath$2.run(URLClassPath.java:258)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.URLClassPath.getLoader(URLClassPath.java:247)
at sun.misc.URLClassPath.getLoader(URLClassPath.java:224)
at sun.misc.URLClassPath.getResource(URLClassPath.java:137)
at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:189)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:130)
at sun.plugin.security.PluginClassLoader.findClass(PluginClassLoader.java:185)
at java.lang.ClassLoader.loadClass(ClassLoader.java:308)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:110)
at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:379)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:542)
at sun.plugin.AppletViewer.createApplet(AppletViewer.java:1425)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:478)
at sun.applet.AppletPanel.run(AppletPanel.java:293)
at java.lang.Thread.run(Thread.java:539)


Step to reproduces it
-------------
 1) export NPX_PLUGIN_PATH=JDK/jre/plugin/sparc/ns4
 2) start Netscape
 3) go to following URL
        http://jtgb4u4c.sfbay/sail7/Plug-in/slaveHTML/jck14_slave_unt.html

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