Posted by Xerxes Rånby on Sep 11, 2012; 10:35am
URL: https://forum.jogamp.org/Win-7-1-7-0-07-b11-InvalidKeyException-Wrong-Key-Usage-on-all-applets-tp4026082p4026089.html

Thank you gouessej!

Enabeling online verification of certificates in the java control panel did fix this issue.
Spot on!

Cheers
Xerxes