When caching disable, using webstart to launch JNLP with applet-desc causes NPE

1. disable cache using Java Control Panel.
2. Run: javaws http://javaweb/~ntnguyen/tests/check-always-lazy-update/background-update-check-applet.jnlp


Exception in thread "AWT-EventQueue-3" java.lang.NullPointerException
at sun.plugin2.applet.viewer.JNLP2Viewer$1.run(JNLP2Viewer.java:347)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:701)
at java.awt.EventQueue.access$000(EventQueue.java:102)
at java.awt.EventQueue$3.run(EventQueue.java:662)
at java.awt.EventQueue$3.run(EventQueue.java:660)