Any chance we can get an update to support 1.7.0_25+? I think it would be as simple as adding "Caller-Allowable-Codebase: *" to the manifest.
JRE 1.7.0_25 release notes:
JRE 1.7.0_25 is now below the security baseline which is why this problem suddenly popped up for users who were happily using this version previously. 1.7.0_45 was released today.
JRE 1.7.0_45 release notes: