I noticed you had problems with Oracle Forms after upgrading to the F5 to version 12. HttpOnly was added as an enabled default in version 12 which I missed. Try making a cookie with that feature disabled, and things should work again. Browsers other than IE won't pass the flag, and Oracle has marked it as "Won't Fix".
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8038997
I also noticed the Secure attribute caused a similar problem when I tried to exit the Oracle Forms applet, so disabling that might help fix other issues.