title: 'password authentication failed for user "postgres"'
body: <p>I have installed PostgreSQL 8.4, Postgres client and Pgadmin 3. Authentication failed for user "postgres" for both console client and Pgadmin. I have typed user as "postgres" and password "postgres", because it worked before. But now authentication is failed. I did it before a couple of times without this problem. What should I do? And what happens?</p>
  
  <pre><code>psql -U postgres -h localhost -W
  Password for user postgres: 
  psql: FATAL:  password authentication failed for user "postgres"
  FATAL:  password authentication failed for user "postgres"
  </code></pre>