Description:
------------
This bug's PHP Version is set to 5.2.11 but that's not true. I cannot upgrade my version from 5.2.6 at the moment. Sorry about this.

I was trying to prepare a statement where a field name had a "-" and it was returning (boolean)FALSE. As soon as I updated my database field "e-mail" to "email", and changed my statement to match the field again, it worked like a charm.

Reproduce code:
---------------
<?php
$mysqli = new mysqli('localhost','root','pass');
$mysqli->select_db('test');

$query = "INSERT INTO
            dummy
            ( name, e-mail, title, text)
            VALUES (
              ?,    ?,    ?,        ?)";

var_dump($mysqli->prepare($query));
?>

Expected result:
----------------
object(mysqli_stmt)

Actual result:
--------------
false(boolean)