FULL PRODUCT VERSION :
JRE 1.6.0 Update 3

ADDITIONAL OS VERSION INFORMATION :
Any versions of Windows XP

A DESCRIPTION OF THE PROBLEM :

For some customers on Web start 1.6.0_3, they are getting repeated downloads of their jar files. It appears to be an issue with the the way version 1.6 does caching.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :

Invoke this app to bring up the login panel and then exit from login panel.
http://baliweb.etrade.com/balicli_alt1/etrader.jnlp

Relaunch app a second time.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -

The second launch should NOT result in another download.
ACTUAL -

For some customers, they are seeing a download everytime of the jar files.

REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :

The only workaround right now is to revert back to previous versions of Web start.

Release Regression From : 6u2
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.