Can't See Thumbnails On Netflix Using Logitech Revue Box

I have two Logitech Revue boxes in two separate locations. Both use powerline over ethernet.  the one that works perfectly usies a Netgear dual-band router and netgear POEN. The second one does NOT display thumbnail sketches on Netflix, but everything else (You Tube, google chrome, etc) works perfectly.  I am using Linksys POEN and router (dual-band) wiuth this. I am also using Comcasts hi-speed "blast" service with this system. any help would be appreciated.