If you are receiving magicnumberexceptions whenever you host your opengl applets (which work locally) on an external site, try this solution:

1) Visit a page on the website that does NOT exist.
(Ie., index12398470847.html, or something silly)
2) You should receive a simple 404 - page not found page.
3) If you are redirected to another page, that's no good.

My solution was to change the 404 handling on my website so that an actual 404 page was returned.
(add <? header("HTTP/1.0 404 Not Found"); ?> to the top of the error page)

Why does this solution work?

The joglAppletLoader does a query for some JOAL libraries by actually just testing whether the URL exists. It got a page instead of a 404 error, and so it assumed that the applet used JOAL. It tries to load JOAL, and crashes.

thanks for the info.
reading the source the are aware of the problem:
Code:

..
// See whether JOAL is present
try {
	Class alClass = Class.forName("net.java.games.joal.AL", false, this.getClass().getClassLoader());
	haveJOAL = true;
	// Note: it seems that some JRE implementations can throw
	// SecurityException as well as ClassNotFoundException, at least
	// if the OpenAL classes are not present and the web server
	// redirects elsewhere
} catch (Exception e) {
}
.. 

do not understand why i would crash though..