I'm getting the error: FATAL: Peer authentication failed for user "postgres" when I try to make postgres work with Rails. Here's my pg_hba.conf, my database.yml, and a dump of the full trace. I changed authentication to md5 in pg_hba and tried different things, but none seem to work. I also tried creating a new user and database as per Rails 3.2, FATAL: Peer authentication failed for user (PG::Err