Tested OS/Browser:
                        win 2000 pro(sp4)/IE6
                        XP-pro(sp2)/IE6
                        win 2003 SE/ IE6
                        (Firefox 1.0 on win 98 SE displays the same problem)

Tested build: j2re 1.6.0- build 33

Problem:
-------
Virus Map Tracking applet fails to load with the exception:
java.lang.ClassCastException: java.io.File cannot be cast to com.sun.deploy.cache.CachedJarFile

The applet works fine with MS VM on the same machine/configs

Steps to reproduce:
------------------
1) Install j2re1.6.0-build 33 into the test system
2) Go to http://wtc.trendmicro.com/wtc

The applet fails to load with java.lang.ClassCastException thown in Java console


Here's the detailed info from the Java console:
----------------------------------------------

**********************************************************************************
Java Plug-in 1.6.0
Using JRE version 1.6.0-ea Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\Administrator
network: Loading user-defined proxy configuration ...
network: Done.
network: Loading proxy configuration from Internet Explorer ...
network: Done.
network: Loading manual proxy configuration ...
network: Convert proxy bypass list to regular expression:
network: scaweb1.sfbay.sun.com:8080 --> SCAWEB1.SFBAY.SUN.COM:8080
network: webcache.sfbay.sun.com:8080 --> WEBCACHE.SFBAY.SUN.COM:8080
network: Done.
network: Proxy Configuration: Manual Configuration
     Proxy: http=scaweb1.sfbay.sun.com:8080,https=webcache.sfbay.sun.com:8080,ftp=webcache.sfbay.sun.com:8080,gopher=webcache.sfbay.sun.com:8080,socks=webcache.sfbay.sun.com:8080
     Proxy Overrides: scaweb1.sfbay.sun.com:8080,webcache.sfbay.sun.com:8080


----------------------------------------------------
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
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------

basic: Registered modality listener
liveconnect: Invoking JS method: document
liveconnect: Invoking JS method: URL
basic: Referencing classloader: sun.plugin.ClassLoaderInfo@183f74d, refcount=1
basic: Added progress listener: sun.plugin.util.GrayBoxPainter@1df073d
basic: Loading applet ...
basic: Initializing applet ...
basic: Starting applet ...
network: Get cache entry, url: http://wtc.trendmicro.com/common/wtc.jar?1.1, version: null
network: Cache entry not found
network: Connecting http://wtc.trendmicro.com/common/wtc.jar?1.1 with proxy=HTTP @ scaweb1.sfbay.sun.com/129.145.155.90:8080
network: ResponseCode for http://wtc.trendmicro.com/common/wtc.jar?1.1 : 200
network: Encoding for http://wtc.trendmicro.com/common/wtc.jar?1.1 : null
network: Sever response: (length: 18586, lastModified: Wed Oct 09 19:40:33 PDT 2002, downloadVersion: null, mimeType: application/octet-stream)
network: Doing download: http://wtc.trendmicro.com/common/wtc.jar?1.1
network: Download:encoding GZIP/Plain: = null
network: Wrote URL http://wtc.trendmicro.com/common/wtc.jar?1.1 to File C:\Documents and Settings\Administrator\Application Data\Sun\Java\Deployment\cache\6.0\25ad862d-17f37c93-temp
network: Disconnect connection to http://wtc.trendmicro.com/common/wtc.jar?1.1
java.lang.ClassCastException: java.io.File cannot be cast to com.sun.deploy.cache.CachedJarFile
at com.sun.deploy.cache.CacheEntry.getJarFile(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCachedJarFile(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.<init>(Unknown Source)
at sun.misc.URLClassPath$3.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$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
basic: Exception: java.lang.ClassCastException: java.io.File cannot be cast to com.sun.deploy.cache.CachedJarFile
java.lang.ClassCastException: java.io.File cannot be cast to com.sun.deploy.cache.CachedJarFile
at com.sun.deploy.cache.CacheEntry.getJarFile(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCachedJarFile(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.jar.CachedJarURLConnection.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.getJarFile(Unknown Source)
at sun.misc.URLClassPath$JarLoader.<init>(Unknown Source)
at sun.misc.URLClassPath$3.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 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)

***********************************************************************************
###@###.### 2005-04-27 21:36:39 GMT


Verified the fix in Mustang-b53 on XP-Home(sp2)/IE6