In my HT there are two IR receivers in the front of the room under the screen and one up at the projector which is ceiling mounted and slightly in front of the seating area.

The ipronto when held more or less horizontal hits the front IR receivers and when held vertical hits the one at the projector. I get very reliable IR operation, but there are other factors in my system deign which aide this.

a) All IR receivers are on a Xantech IR network and drive a single emitter which drives an IR to RS232 converter. the RS232 (decoded IR command) is then sent as an ascii string to the PC which handles all control logic and emits either IR or RS232 to the component to be controlled.

b) The iPronto never puts out more than a single IR command per button (touchscreen) press. All macro expansions are done in the PC.

As I said before, in my system the iPronto is a very fancy/pretty IR remote nothing more nothing less. I have no use for RF and it is much less reliable than IR in my situation.