Thanks for the heads up about this, my AppleTV is usually late in notifying me about these updates. Though, I wonder how it can update/add the Apps without any input or notification from me. I always thought these things would be added/updated during updates like these.
I'm not familiar with the Netflix "issue" but I do have an issue with it myself. I find that when I'm watching TV shows back-to-back, there will be some audio sync issues but going in and out of the episode usually fixes it. Also, I turn on my captions and there's also sync issues at times, but it's also fixed the same way. It's annoying, but at least it can be "easily" fixed. Hopefully this update address that.