Which JDBC jar should I use with java 1.5.0_16 and PostgreSQL 8.3.5?
Are you having a problem with the postgresql standard JDBC driver? I'm not using it right now, but I've had it in the past and it worked fine: http://jdbc.postgresql.org/
jdbc4 can only be used with java 1.6+, so you need 8.3-XYZ.jdbc3.