Thanks for the reply. After doing some more testing, the CPU usage problem only occurs when connecting to my SlingBox Pro HD and not my second SlingBox Pro. I suspect the difference is that the SlingBox Pro uses a WMV stream (640x480 causes about 20% CPU) while the ProHD uses an h264 stream (640x480 causes 90% CPU). According to this forum: http://placeshiftingenthusiasts.com/forum/slingbox-hardware/slingbox-pro-best-firmwareslingplayer-version/page-2/ it used to be possible to force the older SlingPlayer application to prefer WMV over h264 streams. Is there any way to force a stream preference on SlingFront?