sean@sarcasm:~/cvs/pecl/pdo_user$ php -d'extension=pdo_user.so'
PHP Fatal error:  PDO: driver user requires PDO API version 20060409; this is PDO version 20060511 in Unknown on line 0

Fatal error: PDO: driver user requires PDO API version 20060409; this is PDO version 20060511 in Unknown on line 0
PHP Fatal error:  Unable to start pdo_user module in Unknown on line 0

Fatal error: Unable to start pdo_user module in Unknown on line 0