Partitioning: INSERT 0 0 but want INSERT 0 1

I figure this subject belongs on the performance mailing list because it is
about partitioning, which is a performance issue.

I'm working on partitioning some of the tables used by an application that
uses OpenJPA. It turns out that OpenJPA is sensitive to the numbers
returned when you do an insert. So I put together a test and attached it.
My postgres version is 8.3.1 compiled from source.

My problem is that this:
test=> INSERT INTO ttt (a, b) VALUES ('5-5-08', 'test11212');
INSERT 0 0
Time: 21.646 ms
needs to show:
INSERT 0 1

or OpenJPA will not accept it. The insert works, but OpenJPA does not
believe it and aborts the current transaction.

Is it possible to have partitioning and have insert show the right number of
rows inserted?

Thanks,

--Nik