JWS can't find cache file after network crash

Customer reports an issue using Java WebStart 6.0u4 after a network crash.

1) Install software for the first time

Desktop icon points to

C:\WINDOWS\system32\javaws.exe "C:\Documents and
Settings\bioffe\Application
Data\Sun\Java\Deployment\cache\6.0\56\39a9fe38-259ec8ac"

The content of this directory is this
 Directory of C:\Documents and Settings\bioffe\Application
Data\Sun\Java\Deployment\cache\6.0\56

01/07/2008 05:20 PM <DIR> .
01/07/2008 05:20 PM <DIR> ..
01/07/2008 05:20 PM 2,956 39a9fe38-259ec8ac
01/07/2008 05:20 PM 361 39a9fe38-259ec8ac.idx
01/07/2008 05:20 PM 359 39a9fe38-6.0.lap

Everything works fine.

2)I update jnlp file and touch largest jar. It provokes massive
download, during which I simulate network outage, by pulling the
plug or disable the network connection.
It rightfully fails. And I launch it again, with good internet
connection. Notice that information.

"C:\Documents and Settings\bioffe\Application
Data\Sun\Java\Deployment\cache\6.0\22\63c55516-2498876c"

 Directory of C:\Documents and Settings\bioffe\Application
Data\Sun\Java\Deployment\cache\6.0\22

01/07/2008 06:02 PM <DIR> .
01/07/2008 06:02 PM <DIR> ..
01/07/2008 06:02 PM 2,877 63c55516-391105fb
01/07/2008 06:02 PM 362 63c55516-391105fb.idx
01/07/2008 05:51 PM 359 63c55516-6.0.lap

The link points to nowhere.

We can no longer can execute this link. It fails with error.

CouldNotLoadArgumentException[ Could not load file/URL specified:
C:\Documents and Settings\bioffe\Application
Data\Sun\Java\Deployment\cache\6.0\22\63c55516-2498876c]
    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)

In Java WebStart 5.0 this scenario is being handled gracefully.

This seems similar to bug 6446676, with the addition of a network crash in the middle of updating the jnlp file.

The customer's jnlp file and screenshots of the Java Console errors are attached.