I am also struggling with this issue. All of the above speak to my situation as well (same systems, Slingbox Pro-HD). Updated SW across the board and even DL'd the new slingbox for free app. Oddly, when I try to mirror (in lieu of the native stream) the image appears for a few seconds and then disappears, and leaves just audio. I can't help but feel the functionality is being suppressed. Slingbox, any comment? Longtime user and subscriber here.