possible bug in DB/pgsql.php

Hello,
I have asked Mr. Bakken about transaction management in DB/pgsql.php
before via a private msg. I have had written a quick hack to check out
how it works...

The below code is assumed to make two inserts and rollback afterwards.
I was expecting to see no records inserted however both inserts ended
with success.

Any ideas on how to implement transactions with postgresql? Am I doing
anything wrong? (BTW, running on RH6.2 Linux w/ Php4.0.4pl1, cvs
synched fresh PEAR and pgsql 7.0.3...)

with regards,
-bd

<?php
        require_once("/usr/local/lib/php/DB.php");
        $database=DB::factory("pgsql");
       
$dsn=array(phptype=>"pgsql",hostspec=>"localhost",database=>"kek");
        $database->connect($dsn);
        $database->autocommit(FALSE);
        $handle=$database->query("insert into names values
(1,'burak')");
        $handle=$database->query("insert into cities values
(2,'ankara')");
        $database->rollback();
?>