FULL PRODUCT VERSION :
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) Client VM (build 24.51-b03, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601] - Windows 7 64 bit
Microsoft Windows XP [Version 5.1.2600] - Windows XP

EXTRA RELEVANT SYSTEM CONFIGURATION :
Machine in Workgroup.
Local Windows profile.
Java settings not managed by administrative options.
No Deployment Ruleset configured.
Only 32 bit Java installed.


A DESCRIPTION OF THE PROBLEM :
Site exception list only allows application to run on initial download and run. Subsequent attempts to run the application fail.

REGRESSION. Last worked in version 7u45

ADDITIONAL REGRESSION INFORMATION:
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) Client VM (build 24.45-b08, mixed mode, sharing)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Java security set to High.
Delete installed Java applications and applets.
Add the URL for host to the exception site list e.g. http://172.16.1.1/
Open URL in Internet Explorer.
Java shows security warning messages, click run and the application loads.
Close application and allow associated IE processes to close.
Re-open URL in Internet Explorer.
Java shows security warning messages, click run and the application fails to run with "Missing required Permissions manifest attribute in main jar:" error message.
Close application and allow IE processes to close.
Delete Java applications and Applets.
Re-open URL in IE.
Java shows security warning messages, click run and the application loads.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
When added to Exception Site List, the application should be allowed to run for every attempt as per http://www.java.com/en/download/help/java_blocked.xml

ACTUAL -
Application is only allowed to run on initial download and run. Subsequent attempts fail.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Console output.

Missing Application-Name manifest attribute for: http://172.16.1.1/wt-app.jar
#### Java Web Start Error:
#### Missing required Permissions manifest attribute in main jar: http://172.16.1.1/wt-app.jar.pack.gz


REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
Change Java security level to Medium and add to Exception Site List, or leave at High and delete Java application and applets before opening application.