It seems someone has removed the signatures on the JOGL webstart files (such as jogl.jar) so that the extension mechanism no longer works, e.g. via the entry:
<extension name="jogl" href="http://download.java.net/media/jogl/builds/archive/jsr-231-webstart-current/jogl.jnlp
in my own jnlp file. The files were last modified on 17th September 2011, and inspection of the jar files shows they have not been signed (or have had their signature files removed).
We have a lot of code which now no longer works, it would be great if this could be fixed. If this is the wrong place to post this, or I am being dumb please let me know.