File upload directive: $_FILES['filename']['name'] instead of $_FILES['filename']['tmp_name']

[Andrei Iarus <poni1111@xxxxxxxxx>]

Hello,
 
On my production & testing servers (production runs on a centrino and testing runs on Windows) I can only access the temporary uploaded file using 
ini_get( 'upload_tmp_dir' . '/' . $_FILES['filename']['name'];
while the file $_FILES['filename']['tmp_name'] simply does not exist (checked with file_exists() function, and also looking in the temporary folder).
 
Is there a problem with my PHP installations? Is there any directive to change this bihaviour?
 
On production: PHP 5.2.10 and on testing: PHP 5.2.8 and 5.3.0
 
Thanks in advance.