When an applet accesses a URL, such as the Animator applet demo loading its sound file, an AccessControlException: access denied (java.util.PropertyPermission http.keepAlive read) is throw when sun.net.www.http.HttpClient.getHttpKeepAliveSet(HttpClient.java: 182) tries to read the http.keepAlive system property.

To test this, try:

  http://192.9.48.9/products/plugin/1.2.2/demos/applets/Animator/example1.html

I ran into this on WinNT, IE 5.0, 1.3-I JRE and plug-in.