It asks you to read: ftp://ftp.porcupine.org/mirrors/postfix-release/official/postfix-2.6.5.RELEASE_NOTES That file doesn't exist. The closest thing there belongs to a bit newer version: ftp://ftp.porcupine.org/mirrors/postfix-release/official/postfix-2.6.6.RELEASE_NOTES
Fixed in current versions in the tree.