For those who are manually updating.
I did the manual update and was really pleased with the new firmware. I started having problems with WiFi dropping and I figured it was my router but decided to check with Amazon customer service to see if people had reported it. They asked me to verify my firmware version and when I did they told me I should not have received the update yet. I put on my "I don't know how this newfangled technologicky stuff works" voice and asked a bunch of stupid questions like could hooking up to a friends network or having the date set wrong have made it update. He bought it and said it appears to have happened to a few people.
He did give me the obligatory "it would void your warranty" if I installed it manually speech then verified my connection looked good and they could see my unit over the web. He asked if I waned to replace it under warranty anyway to be safe, I declined and he let me know I would hvae to go through all the steps we had again if I wanted to replace it later.
So short story long - I would keep you old version number handy if you manually update and maybe end up getting a soft brick you can't recover yourself down the road, at least until we are pretty sure the official update has gone global.