Watching the OT on Spike right now, something I always noticed but don't remember seeing come up in the thread (although with almost 1000 pages, it's hard to go back and check for it)...

When Vader chokes Needa then turns to Piett for an update, at the end of the scene when Piett says "Alert all commands - deploy the fleet", for some reason the sound mix on that line sounds like Ben Burtt left the "comm link filter" on - it doesn't sound like Piett is there saying it but saying it over a comm channel.