setting PreparedStatement parameter using "at time zone interval ?"

I'm using the latest 8.3 development driver against an 8.3 database. I
thought back in 8.1 I used to be able to use a PreparedStatement that
included something like

... date(l.created AT TIME ZONE INTERVAL ?)

but now I am always getting an exception like

org.postgresql.util.PSQLException: ERROR: syntax error at or near "$1"

I found if I changed the query to use this syntax:

... date(timezone(?::interval, l.created))

it worked fine. Should the former syntax be supported by the JDBC driver?

-- m@