According to the release notes it fixes some bugs in AMM which apparently were introduced by 1.60 . I haven’t observed those bugs, but there I did notice that 1.60 changed AMM such that My scene turning it on no longer worked and I had to set it up again. The more worrying bug is that power cycling can cause AMM to not pass audio, and since we use AMM for unattended operation and sometimes people forget to power down properly this might hit us.
So it looks like I had better do the update.
Slightly concerned by CHris’ observation. Can anyone confirm all is OK?