Hey.. it seems that Apple has changed the way codesign works. On Mavericks with current XCode, Unless you use the --deep option, your app isn't signed at all. And when you use --deep, it works fine as long as you don't bundle a JRE as plugin.
Is anybody else having this issue... and perhaps a solution? Thanks, -hendrik PS: I'd be very surprised, if the official Oracle recommendation (http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/packagingAppsForMac.html) actually still worked.