Our packager ant script, which invokes a custom post-image wsf script on windows in order to add a few things to the build image after initial setup, is now failing under JDK 8u40 due to the fact that the fxbundler image folders are now set to be read-only, which effectively disallows copying or moving files into the installation image via wsf script. (Note that trying to programmatically reset the installation image folders to be writable via wsf script prior to copying/moving also fails with a permissions error.)