Hi, You can download the release candidate from http://people.apache.org/~shinichiro/apache-manifoldcf-0.5.1-RC0/ and there is also a tag in svn under https://svn.apache.org/repos/asf/incubator/lcf/tags
I've already checked signatures, run example and run "ant test-dr test-hs". Thank you, Shinichiro Abe