deployment.properties doesn't get refreshed correctly under some downgrade install scenario

On some systems the applet loads with previous version of JRE after
following below steps.

Steps:
------

  - Static install 6u11
  - Family Install 6u10
  - Launch an Applet
http://sqindia.india.sun.com/disk17/deployment/rakesh/pip/ssv/Clock.html

A security dialog "Java Security Warning" is shown, mentioning that
Applet wants to be executed on 6u10 (screenshot attached). Click "Run"
applet is launched with 6u10.

Applet tag doesn't explicitly request 6u10, hence the expected behavior is that
that applet must always be launched with 6u11.