Description:
------------
I'm tring to get information from an access database using a join of 2 tables. The columns used in the join condition is returned by PHP incorrectly. On small datasets everything works fine. For larger datasets the bug always occurs. 

I have already compacted/repaired the database, this is not the problem. The query works fine in actual access database.

for now fetching by column number will work but fetching associative does not

Thanks,
Jordan

Note: This bug is on PHP 5.1.4, for some reason I can't select a 5.1.4 version in the dropdown. 

Reproduce code:
---------------
$dsn = "odbc:Driver={Microsoft Access Driver (*.mdb)};Dbq=C:\\test.mdb";
$DB = new PDO($dsn, null, null);
$SQL = "SELECT * FROM A inner JOIN B ON A.AID = B.AID;";
$res = $DB->query($SQL);
foreach($res->fetchAll(PDO::FETCH_ASSOC) as $row)
	print_r($row);



Expected result:
----------------
Array
(
    [AID] => 1
    [INFO] => info
    [BID] => 2
    [DATA] => data
)
...etc...

Actual result:
--------------
Array
(
    [AID] => 
    [INFO] => info
    [BID] => 2
    [DATA] => data
)
...etc...
none of the returned arrays contain AID

if $res->fetchAll() is used we instead get the following:

Array
(
    [AID] =>
    [0] => 1
    [INFO] => info
    [1] => info
    [BID] => 2
    [2] => 2
    [3] => 1
    [DATA] => data
    [4] => data
)
...etc...