When Will This Happen?

I'm trying to use the beta 3 JDBC driver in WebLogic. I'm getting:

No results were returned by the query.
at
org.postgresql.jdbc1.AbstractJdbc1Statement.executeQuery(AbstractJdbc1Statement.java:157)

As far as I can tell, the statements being executed are:

SELECT rolename, username FROM user_roles WHERE 1 = 0
SELECT user_id, username FROM users WHERE 1 = 0
SELECT * FROM users WHERE 1 = 0

I don't have any trouble executing those outside WebLogic. What
can cause that "No results were returned" SQLException to come up instead
of just a value ResultSet with no rows?

Thanks,
Aaron