So I'm going to stick this here...since it happened during YWT this morning. Apparently, in the 8:10ET block, the feed went crazy and then turned off...leaving the LDL running over a black screen. The local commercials came on, then went back to black. The Local (normal music too) started without the IStar local (just the LDL with the Sat), then everything was back to normal.
First time seeing the new Sat graphics live...it looks freaking awesome.