Page template option missing

I checked everything suggested in that response: “page attributes” option is checked, template file is located at theme root folder, I tried several file encoding options in my text editor (UTF8 with or without BOM), I tried switching to another theme then back to my custom theme, I do have the right stuff on top:

<?php
/*
Template Name: Page Actualites
*/
?>

Why am I still not seeing the page template dropdown list?