Description:
------------
In PHP 5.2.0 I have seen issues when trying to set the PDO::ATTR_AUTOCOMMIT attribut via the connect.  This issue was not apparent in 5.1.4.  I have reproduced the same issue with the following PDO based extensions:

- PDO_IBM
- PDO_INFOMRIX
- PDO_ODBC

Thank you.

Reproduce code:
---------------
<?php

$db = new PDO("ibm:db", "uname", "***", array(PDO::ATTR_AUTOCOMMIT => 0));

if ($db) print "Connection Established";

?>

Expected result:
----------------
Connection Established

Actual result:
--------------
Fatal error: Uncaught exception 'PDOException' with message 'The auto-commit mode cannot be changed for this driver' in repro.php:3
Stack trace:
#0 repro.php(3): PDO->__construct('ibm:db', 'unam', '***', Array)
#1 {main}
  thrown in repro.php on line 3