So to clarify; the 24.000 fps related stutter affects all apps, including Infuse. It’s just that Netflix is especially affected due to most Netflix original programming being shot at 24.000 fps. The industry standard is still 23.976 fps though, so most, but not all, material outside of Netflix, both movies and TV shows, are not affected by the Apple TVs lack of support for 24.000 fps.
The more random stutter that I’m talking about is somehow related to the way that Infuse handles subtitles. It is much less apparent since the last Infuse update, but it’s still there I’m afraid.
Just like you, I’m very sensitive to frame skips and I never see them when watching without subtitles, or when watching Blu-ray rips with embedded “Blu-ray type” subtitles.
This seems to only affect WEB-DLs with embedded subtitles and content being watched with subtitles downloaded using the built in Open Subtitles function or loaded externally.