yeah, I have a few gray hairs due to IR systems. The best solution is to avoid them when possible. If you are doing a Crestron system for example try to spec in equipment that uses RS-232. If you have to use IR try to spec equipment that has an IR plug in on the back. Makes installs prettier and usually works better without interference problems. Lastly, I would say to keep a log of the equipment that causes the most problems, I have most poblems with sat receivers, then find out exactly what the IR protocol is. There are some tricks to make the difficult IR commands record better.