I'm using the JBoss 3.0 beta from 2002-02-21 on Sourceforge. Properties that are declared as type java.sql.Date don't work with the PostgreSQL driver (haven't tried it with others). When I switch to java.util.Date, things work. Using java.sql.Date, JBoss or the PostgreSQL driver seem to try to store a binary value (probably the serialized form of the java.sql.Date instance), which obviously does not fit in a DATE field. Is this a bug in JBoss?