Well if S529 is the current core I hope they do some major work on it. The other night I hard three more in a row quick blackouts that surprisingly did not affect active recordings. The screen on the TV goes black and the audio dead, the red light on the box stayed on, the green one went on and off. No fans racing or "start up screens". The duration of the blackouts were quite short, but annoying. After things came back up the third time the audio was twice as loud, about the same level as my other devices, and I didn't have to crank up the volume on my AVR to get a good listening level. This was only for that night, since the audio level has dropped back to its old level and I really have to turn up the volume compared to my other devices. And I get a hissing sound when there is a picture on the screen. No picture, no hissing. This behavior did not start until S528.
I realize that the CUI is a skin, but would hope that the core be "newer" and more "solid" to go with the "new" H3. Oh there was a full page H3 ad in the February edition of Residential Systems magazine.