I've only tested it for a bit, but the two things I really noticed with the 8.90.4 & 5 releases was that the "subtitle" menu was missing and the crash after you watched a movie.
Both problems fixed with this release.
If there's anything else I should test please let me know.
Actually, I just tried this on my M1 connected to a Onkyo NR626... I get no sound at all. Might be a coincidence but though I'd report it.