Exception coming, when you try to clean-up downloaded application (Clear Folder) with the view <View/Downloaded Applications>.

Windows platform
Java Web Start 1.4.2-internal
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-internal-jmelvin_01_oct_2002_10_02)

Steps:
- make sure your jaws java console enabled
- download one or two jaws applications
- go to the view View/Downloaded applications
- go to File/Preferences/Advanced
- click on Clear Folder
- you can see exception in your console
It is very difficult to reproduce, try couple times with different applications.
Also see Comments.

Log:
>Java Web Start 1.4.2 Console, started Wed Oct 02 15:20:19 PDT 2002Java 2 
>Runtime 
>Environment: Version 1.4.2 by Sun Microsystems 
>Inc.java.lang.NullPointerException	at 
>com.sun.javaws.ui.player.HTMLEntryManager.stop(Unknown Source)	at 
>com.sun.javaws.ui.player.RemoteURL$2.actionPerformed(Unknown Source)	at 
>javax.swing.JComboBox.fireActionEvent(Unknown Source)	at 
>javax.swing.JComboBox.setSelectedItem(Unknown Source)	at 
>com.sun.javaws.ui.player.Player.updateEntryManager(Unknown Source)	at 
>com.sun.javaws.ui.player.Player.resetHTMLEntryManager(Unknown Source)	at 
>com.sun.javaws.ui.player.Player$25.actionPerformed(Unknown Source)	at 
>javax.swing.AbstractButton.fireActionPerformed(Unknown Source)	at 
>javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Unknown Source)	
>at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)	at 
>javax.swing.DefaultButtonModel.setPressed(Unknown Source)	at 
>javax.swing.AbstractButton.doClick(Unknown Source)	at 
>javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)	at 
>javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(Unknown 
>Source)	at java.awt.Component.processMouseEvent(Unknown Source)	at 
>java.awt.Component.processEvent(Unknown Source)	at 
>java.awt.Container.processEvent(Unknown Source)	at 
>java.awt.Component.dispatchEventImpl(Unknown Source)	at 
>java.awt.Container.dispatchEventImpl(Unknown Source)	at 
>java.awt.Component.dispatchEvent(Unknown Source)	at 
>java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)	at 
>java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)	at 
>java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)	at 
>java.awt.Container.dispatchEventImpl(Unknown Source)	at 
>java.awt.Window.dispatchEventImpl(Unknown Source)	at 
>java.awt.Component.dispatchEvent(Unknown Source)	at 
>java.awt.EventQueue.dispatchEvent(Unknown Source)	at 
>java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)	at 
>java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)	at 
>java.awt.EventDispatchThread.pumpEvents(Unknown Source)	at 
>java.awt.EventDispatchThread.pumpEvents(Unknown Source)	at 
>java.awt.EventDispatchThread.run(Unknown Source)

N/A

ok fix
 xxxxx@xxxxx  2002-10-10