BUG #2020: 7.3 -> 8.0.4 migration timestamp problem

The following bug has been logged online:

Bug reference:      2020
Logged by:          Fernando Rubbo
Email address:      fernando@diuno.com.br
PostgreSQL version: 8.0.4
Operating system:   Linux - Fedora Core 3
Description:        7.3 -> 8.0.4 migration timestamp problem
Details:

1)
    I have a problem with the timestamp before 1914.
    When i execute the query by java statement it has no problem, but when i
execute the query
    by java preparedstatement the timestamp before 1914 have problems like
this:

      PreparedStatement pst = con.prepareStatement("insert into teste values
(?, ?, ?)");
      pst.setObject(1, new Integer(1));
      pst.setObject(2, "TESTE");
      Calendar c = new GregorianCalendar(1913, 0, 1, 0, 0, 0);
      Timestamp t = new Timestamp(c.getTimeInMillis());
      pst.setTimestamp(3, t);
      pst.executeUpdate();

    The result in the database is the timestamp equal 1912-12-31 23:53:12.0

    PS: i have already debugged the Postgres-8.0 (build 313) driver and it
seems to send the correct date to database.

   2)
      Another problem is with functions like date_trunc and date_part that
use a timestamp parameter.
      The problem ocurrs only with the java preparedstatment.

      Calendar c = new GregorianCalendar();
      Timestamp ts = new Timestamp(c.getTimeInMillis());
      pst = con.prepareStatement("select date_trunc('day', TIMESTAMP ?)");
      pst.setObject(1, ts);
      rs = pst.executeQuery();

      below the printstacktrace:

      Exception in thread "main" java.sql.SQLException: ERROR: syntax error
at or near "$1"
   at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorI
mpl.java:1471)
   at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.ja
va:1256)
   at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:175)

   at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.j
ava:392)
   at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2St
atement.java:330)
   at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statem
ent.java:240)
   at teste.Teste3.main(Teste3.java:54)