Description:
------------
When using PDO prepare (and query as well) running with fcgi it causes an Internal Server Error and Premature end of script headers;

(excuse the messy code, just for a test case)

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

	
	class Config_sql {	
	
		public function __construct() {
			$this->_sql = new PDO( 'mysql:host=127.0.0.1;dbname=foobar;port=3306', 'username', 'password' );
		}
		
		public function load( $table ) {			
			$pdo_st = $this->_sql->prepare( 'SELECT * FROM tcm_'.$table.'_envs WHERE id = ?' );
			$pdo_st->execute( array( 1 ) );
			die( var_dump( $pdo_st->fetchAll( PDO::FETCH_ASSOC ) ) );				
		}	
				
	}
	
	$conf = new Config_sql;
	$conf->load( 'config' );
	
?>

Expected result:
----------------
An output such as the following:

array
  0 => 
    array
      'id' => string '1' (length=1)
      'env' => string 'production' (length=10)
      'extends' => string '0' (length=1)



Actual result:
--------------
Internal Server Error and this in my error.log

[Wed Mar 19 08:10:58 2008] [warn] mod_fcgid: Read data error, fastcgi server has close connection
[Wed Mar 19 08:10:58 2008] [error] [client xxx.xxx.xxx.xxx] Premature end of script headers: pdo_bug.php