Hi,
I have mine in a cupboard and it does get quite warm. Surprisingly, considering my Kit and an HTPC, most of the heat is generated by the SkyHD box
However I don't believe this is heat related, as I have mine mounted on the back of the front door to the cupboard. Sometimes when I am fiddling / updating / swearing at the Harmony, this door remains open so the RF unit doesn't get warm. Also this issue occurs from startup (I switch all my kit off at night).
I have to say if this issue
is heat related it is just more bad design on logitechs part, I mean these things are
supposed to go in cupbaords right?
Adam