There is a mistake in section 2.2.5 of the Crowd install documentation guide. In part 3, "Configure your application server to connect to PostgreSQL", under part one says "Edit the conf/Catalina/localhost/crowd.xml and customise the username, password, driverClassName and url parameters for the Datasource." is should say, "Edit the conf/Catalina/localhost/ openidserver.xml and customise the username, password, driverClassName and url parameters for the Datasource."

URL: http://confluence.atlassian.com/display/CROWD/2.2.5+PostgreSQL