I'm running a SlingBox Pro HD on Mac OSX, outputting it via mini-DV to HDMI into a flatscreen. It's connected to my DirecTV HD DVR back home. The problem is, the "Fullscreen" feature on Slingbox, which I click on for optimum size, exits on its own every ten minutes or so. I have to re-click "Fullscreen" to send it back into fullscreen constantly. There must be some way to avoid this issue. Any help is much appreciated. Thanks!