I have no problems with my UBEC. I have it inside a small plastic project box to protect it from the elements and my RX is a spektrum sr3000. They are within 2.5 inches of each other. No glitching whatsoever.
I blew up my UBEC but it was becasue I shorted the batteries against the chassis not because the UBEC was at fault. I replaced it and I haven't had a problem since. At least with that. I have other problems. :007: