We have just begun using DIgital Signage and it's been pretty smooth, except for one issue: on all of our flat panels (multiple brands-- Vizio, LG, Samsung), there is a black bar at the bottom, preventing true full-screen playback. The bar is bigger (deeper?) on some screens that it is on others, but it is on all of them.
It's odd, as the 1920 x 1080 image appears to be fully loaded and not clipped anywhere or distorted, which I don't understand. I created a tet image with a colored rule around it and I can see the entire rule on all sides and yet there is a black bar/band at the bottom!
All of the sets are set-up for 1080. When running USB slideshows (plugged directly into the step via thumb drive), the screens fill completely as they should.