I am able to get an LDAP connection, and log in using an Active Directory user, using the included Derby database, but when I switch over to PostgreSQL as my database, I am not able to log in as an LDAP user or as Administrator/Administrator. Can you think of any reason off the top that this would be? I have followed the documentation located here http://doc.nuxeo.com/display/ADMINDOC/Using+a+LDAP+directory

Update - The only two relevant lines in the server log that I get are: 2012-08-09 17:10:01,916 DEBUG [org.nuxeo.runtime.model.RuntimeContext] Deploying component from url file:/C:/nuxeo55/nxserver/config/default-ldap-users-directory-config.xml 2012-08-09 17:10:46,751 INFO [org.nuxeo.ecm.platform.ui.web.auth.NuxeoAuthenticationFilter] Login failed for mlpo