currval bug??

Hi all,
i have recently upgraded my development environment:
FROM postgresql 7.4 TO postgresql 8.0beta5
FROM jdk1.4 TO jdk1.5
FROM pg74.215.jdbc3.jar TO pg80b1.308.jdbc3.jar

now, i have a FRUSTRATING bug:

With this query (which works fine with previous pg74jdbc):

*insert into tablename (fieldname) values ('testvalue');select
currval('tablename_id_seq');*

this exeception was throwed:

*org.postgresql.util.PSQLException: No results were returned by the query.*

Obviously the query has to return a result.

Any idea?
thanks!!
gaboc

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