FULL PRODUCT VERSION :
JRE 6 Update 13

ADDITIONAL OS VERSION INFORMATION :
Windows Vista Ultimate 64-bit

A DESCRIPTION OF THE PROBLEM :
With an applet that worked with Update 12 on Windows Vista 64-bit, an applet loaded in Chrome or Firefox, will show the new loading screen with the progress bar at zero. This will go on for a long period of time, until an exception is produced, and error message displayed.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Using Vista 64-bit and Mozilla Firefox 3.0.10 with JRE 6 Update 13 go to here:
http://java.com/en/download/help/testvm.xml

If one disables the next generation plugin, it loads properly.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Applet to load successfully.
ACTUAL -
After unsuccessful loading. An error message is displayed.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
load: class testvmDynamicJavaComPopUp819.class not found.
java.lang.ClassNotFoundException: testvmDynamicJavaComPopUp819.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown
Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 7 more
Exception: java.lang.ClassNotFoundException: testvmDynamicJavaComPopUp819.

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
Disable the next generation plug in option in the Java Console.

Release Regression From : 6u12
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.