Everybody seems to be talking about garbled or cut-out audio - I have no audio when I turn on the STB and the Plasma, until I either change inputs (i.e. - switch from HDMI1 to HDMI2 then back) or in the actual HDMI1 settings for audio switch from "Digital" to another setting then back?!?!  My audio output on the ATT box is set to 5.1.  The TV is a Panasonic TCP50S2, and I was concerned as to whether it was a faulty TV or the STB?  I contacted ATT and they said to switch to component cables and that it was a known issue...  Wow, great service - they are starting to look a lot more like comcast!!!  The U-Verse box is the Motorola VIP1200.