I've always used this:
function disableAutoSave(){
wp_deregister_script('autosave');
}
add_action( 'wp_print_scripts', 'disableAutoSave' );
but in WP 3.3 (Debug On) it throws:
Notice: Undefined index: autosave in /{path}/wp-includes/class.wp-scripts.php on line 158
Notice: Trying to get property of non-object in /{path}/wp-includes/class.wp-scripts.php on line 158
What's the correct implementation?