Cannot launch cached Java Web Start applications while system is offline

FULL PRODUCT VERSION :
java version "1.6.0_10-rc"
Java(TM) SE Runtime Environment (build 1.6.0_10-rc-b28)
Java HotSpot(TM) Client VM (build 11.0-b15, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]
XP Pro SP2

A DESCRIPTION OF THE PROBLEM :
I can launch my Web Start application offline from the Java Cache Viewer without any problems. It even appears to be offline - that is, it doesn't download any updates. It only does that when the application is subsequently launched online. However, if I try to launch the application from the command line using the command:

javaws -offline http://localhost/myapp.jnlp

It failed with the message shown below.

com.sun.deploy.net.FailedDownloadException: Cannot download resource. System is offline.
at com.sun.deploy.net.DownloadEngine.isUpdateAvailable(Unknown Source)
at com.sun.deploy.net.DownloadEngine.isUpdateAvailable(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCachedFile(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)



REPRODUCIBILITY :
This bug can be reproduced always.

Release Regression From : 6u7
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.