Posted by Xerxes Rånby on Mar 20, 2013; 6:59pm
URL: https://forum.jogamp.org/Win-7-1-7-0-07-b11-InvalidKeyException-Wrong-Key-Usage-on-all-applets-tp4026082p4028721.html

This issue is now fixed by installing the latest java update.

Java(TM) Platform SE 7 U17
    Fil: npjp2.dll
    Version: 10.17.2.2
    Next Generation Java Plug-in 10.17.2 for Mozilla browsers

Java 7u17 for Windows distributed from www.java.com are now able to load the JogAmp applets and JNLP web-start applications and pass the certificate check without any tweaks of the default install.