NullPointerException while trying to launch/import a "component extension"

This works fine with jre1.5.0_05-b05, but failed with jre1.5.0_06-b03

Steps to reproduce :
--------------------
1. Install mustang jre1.5.0_06-b03
2. Clear cache using javaws -uninstall
3. Launch a jnlp with <component-desc/> element using command ,
javaws http://sceri.prc/~yl153753/tiger/cacheViewer/CacheViewer_Library.jnlp

Exception thrown:
Exception in thread "javawsApplicationMain" java.lang.NullPointerException
at com.sun.javaws.LaunchSelection.selectJRE(Unknown Source)
at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)
at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Nothing got cached .
Same error to import the jnlp using "javaws -import"