None as far as I hear,..it's with my son now down in the sticks,..I set it up at my place this morning & no glitching problems for the half hour I tested it.
I had problems when I got my own 800 almost a year ago so I bought an inline amp,..did'nt help,...turns out it was a heat related problem with channels freezing/glitching as the box warmed up,...I connected a usb powered laptop fan a sat in on the box so never a problem since....if I hear from my son that he's having problems I'll let you know.