My model: 40PFL7605H (last firmware upgraded).
Headphone volume level can be set via a menu option, but it's "statically" set; with this I mean.. after setting volume level in TV menu (with 2 o 3 steps ),after plugging headphones on, audio is ok, but is impossible to control volumen,ie, you cannot change volume "dinamically" on headphones using remote command buttons (+ volume, - volume). Only option is to go again to menu/options/..
So, this is annonying!. Think about it.. you're watching a TV show or a movie, and audio suddenly increase or decrease, and you cannont change it

I would like to know if maybe this can be enhanced by Philips, maybe with a future firmware release, or if this is 'as is' and it will never change. ..