Resource types

After the last update to Moodle 2.7.11, the flv playing with the flowplayer has completely stopped working.
The error in the browser is a 404 in getting /lib/flowplayer/flowplayer-3.2.18.swf.php and the moodle page is composed without the player.
I did some debugging and the 404 is fired by the following lines:

   if (!empty($_GET) or !empty($_POST) or !empty($_REQUEST)) {
        header("HTTP/1.1 404 Not Found");
        die;
    }

into the newly introduced file lib.php of the flowplayer tool. The corresponding MDL-48085 could not be viewed in the tracker, so i can't figure out why this code is there, but i know the removing it, the flv video plays correctly.
In my debugging session, i've found that $_GET and $_POST are empty arrays (so no problems) but $_REQUEST is filled with the cookies, primarily the MoodleSession, but also some google analytics ones.

Maybe i've something wrong somewhere (some hints?), but these checks on input params can be substituted by these lines ?

    unset($_GET);
    unset($_POST);
    unset($_REQUEST);

which cleanup these params before serving the flash ?

Thanks in advance.