Hi guys, As you may recall, a couple of weeks ago it was decided (in this mailing list), that we want to preserve backwards compatibility to Java 6. Instead of having to install JDK 6 alongside your Java 7, you can now use Animal Sniffer[1] to verify this. Simply run "mvn animal-sniffer:check" before you push, and assuming the build is successful, you're good to go. Note: Animal Sniffer takes about a minute to run, so it was NOT added by default to the "install" target. It is still your responsibility to verify backwards compatibility of you code, this is just a convenient way of doing it. Many thanks to Juan and Doron for their insights and reviews for this patch. -Allon [1] http://mojo.codehaus.org/animal-sniffer-maven-plugin/