I am currently running Nuxeo 5.5 on a Debian 7.2 install (tomcat). I just upgraded Debian from 6.0 to 7.2, and tested the server afterwards to make sure nuxeo still worked. It did. Then I manually installed postgresql-9.1 and postgresql-client-9.1 ...
I know according to the Customization documentation: http://doc.nuxeo.com/display/NXDOC55/Customization+and+Development When you are not creating a real Nuxeo Plugin (i.e. a JAR), XML configuration files should: be copied in the “config” directory ...