[Luke M]

Got it yesterday, too.

If I'm not wrong (my boy is using it now, can't check/confirm), it does "fix" one thing.
The description on the Audio is now changed from "Stereo" to "PCM" and it says it supports multi-channel PCM.

Multi-channel PCM is never an issue for me, it's been always working in my setup.
But I know it didn't work for some of the folks here.
I'm wondering if the latest firmware really fixes the multi-channel PCM issue for you?
That is you can choose to get multi-channel PCM instead of DD+ when playing DTS/AAC contents.

Kodi Android v19 changed from using floating point to integer audio, which fixed the 5.1 PCM problem. (7.1 still doesn't work).

I only have 5.1 speakers, so I can't fully confirm if 7.1 is working or not.

But when I play the 7.1 audio test file from Fraunhofer, I can confirm that both Back and Side audios are coming out of my back/surround speakers.
Doesn't it mean that my setup is capable of handling 7.1 audio?

No. Even if Kodi is set to 7.1 (is it?), the channels could be reversed. That was the original problem with 7.1. More recently, it doesn't work at all.