JDK-Info:
---------
java version "1.6.0-beta2"
Java(TM) SE Runtime Environment (build 1.6.0-beta2-b79)
Java HotSpot(TM) Client VM (build 1.6.0-beta2-b79, mixed mode, sharing)


Operating System:
-----------------
Generic


Steps to Reproduce:
-------------------
1) Install jre/jdk
2) Clean cache (\rm -rf ~/.java)
3) Launch a JNLP application which uses user cache
./javaws http://java.sun.com/products/javawebstart/apps/mg.jnlp
4) Enable System cache (./javaws -userConfig deployment.system.cachedir /tmp/abc)
5) Launch Cache Viewer (./javaws -viewer)
Note: Application "Military Game" is listed under "Aplications"
6) Choose "System Applications" from "Show:" combo box

Application "Military Game" is listed under "System Applications" too

Also, NullPointerException is thrown on the prompt

bash-3.00# ./javaws -viewer
bash-3.00# Exception occurred during event dispatching:
java.lang.NullPointerException
        at com.sun.deploy.cache.Cache.getCacheEntries(Cache.java:711)
        at com.sun.deploy.cache.Cache.getJnlpCacheEntries(Cache.java:726)
        at com.sun.javaws.ui.CacheTable$CacheTableModel.refresh(CacheTable.java:315)
        at com.sun.javaws.ui.CacheTable$CacheTableModel.<init>(CacheTable.java:267)
        at com.sun.javaws.ui.CacheTable.reset(CacheTable.java:178)
        at com.sun.javaws.ui.CacheTable.<init>(CacheTable.java:151)
        at com.sun.javaws.ui.CacheViewer$2.run(CacheViewer.java:206)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)