BUG #2036: 8.1 JDBC busted date with INTERVAL update

The following bug has been logged online:

Bug reference:      2036
Logged by:          Reuben Pasquini
Email address:      pasquini@imageworks.com
PostgreSQL version: 8.1
Operating system:   linux
Description:        8.1 JDBC busted date with INTERVAL update
Details:

Hello!

Something like this would work with the postgres-7.4
jdbc3.jar driver, but fails with the shown error with
postgres-8.1 jdbc3.jar driver.
Running with a non-prepared statement works
with 8.1.
I'm running 8.1 server on linux, jdk1.5.
Not sure if this is a bug, or intentional.

Thanks for the great work!
Reuben

----------
s_query = "UPDATE cue.proc SET dt_started = now() - INTERVAL ? WHERE pk=5";
x_stmt = x_conn.prepareStatement ( s_query );
x_stmt.setString ( 1, "0 seconds" );

x_stmt.executeUpdate ();
------------
  org.postgresql.util.PSQLException: ERROR: syntax error at or near "$1"
    at
org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorI
mpl.java:1512)
    at
org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.ja
va:1297)
    at
org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:188)

    at
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.j
ava:430)
    at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2St
atement.java:346)
    at
org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2State
ment.java:300)
    at spijava.cue.CuProcUpdateCommand.doItSimple(CuProcUpdateCommand.java:224)