Same sort of problem here as well.
It's a bit late, so forgive me if i missed anything, but from what i can tell it's the application Salem that is in need of a new valid certificate.
Will try to do the things mentioned above, just thought i let you all know and was wondering if i'd be able to run the game without any major 'securityhazardz'.
The text given ;
'Application blocked by java security'
'For security, applications must now meet the requirments for the High or Very High security settings, or be part of the Exception Site list, to be allowed to run'
'Your security settings have blocked an application signed with an expired or not-yet-valid certicate from running'
Been playing Salem for some time now and haven't had this before.
Thanks for all the info in advance Pilgrims!
EDIT: Added Salem to the 'exception list'. Running smooth like butter again