8.0.3 parse errors where 7.x was ok

I'm getting a new exception when upgrading to Postgres 8.0.3 with the JDBC
drivers it builds:

java.sql.SQLException: ERROR: parse error at or near "$1"

This is happening with the following bit of code:

105 try {
106 s = c.prepareStatement("select now() - interval ?");
107 s.setString(1, "7 days");
108 ResultSet r = s.executeQuery();

The driver was built from postgresql-jdbc-8.0-311.src using the FreeBSD
port on FreeBSD 5.4 with Java 1.4.2-p7.

Using the older jar built for postgresql-7.3.4 works fine.

Is this syntax no longer supported?

Nick

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Nick Johnson, version 2.1 http://web.morons.org/