Update to Apple TV 6.0 has stopped certain movies from being shown from my itunes After updating to the latest Apple TV software 6.0 certain seemingly random movies are now no longer available. These are all movies from my iTunes library that I ripped myself.

I can't see why its discriminating one over the other. Are there new rules for what it now shows?

They were all ripped using Handbrake (Apple TV 3 preset, mp4) and always worked before.

Also these missing movies are available to stream to my iPhone 4s and iPad 2.

Really weird, any help is appreciated.
I figured it out. I've made a blog post about it to help anyone with the same issues:

Apple TV 6.0 missing movies