We have one issue on Windows Vista(64 bit processor) system.
Our software (swing application) is installed on the system using java webstart 6. (client has JRE 1.6_0_10 version,Tomcat 5.0 is pointed to 1.5_0_14)
there were problems when there are updates.
When the user tries to login to the software using shortcut, an application error message "Unable to launch application" is shown.
When checked , it is observed that JNLP is missing. We are sure that it is not deleted manually.