Hi, I found there is a invalid link in <http://spark.apache.org/downloads.html> . The link for release note of Spark 1.0.0 indicates http://spark.apache.org/releases/spark-release-1.0.0.html but this link is invalid. I think that is mistake for <http://spark.apache.org/releases/spark-release-1-0-0.html>.
Thanks, Kousuke